I am seeking an experienced engineer to design and implement a two-axis machine control system that is capable of: - Effectively controlling and managing the movements of the system along two axes with a LIMITED RANGE. Your expertise in designing systems with the necessary navigation strategies and motion control algorithms will be required. - Providing real-time position feedback to the user. Your extensive understanding of feedback mechanisms particular to these types of systems is a must. Ideal expertise for the job includes: - Comprehensive knowledge in machine systems control and design. - A thorough understanding of motion control strategies. - A background in data analysis and logs processing. The machine is a Bandsaw to...
I'm in need of a skilled individual who is proficient in blockchain and wallet analysis, specifically on the Arbitrum blockchain. The project involves analyzing transaction patterns and wallet balances and activities. Key Requirements: - Proficiency in blockchain analysis, particularly on the Arbitrum blockchain - Ability to identify patterns and trends in transactions - Proficient in analyzing wallet balances and activities Deliverables: - A comprehensive report that includes methodology, analysis, and conclusion - The report should be presented in a combination of written format and visual presentation (charts and graphs) Please note that I will provide you with access to the necessary pages and data on Arbiscan. Your task ...
...seeking an expert in Python for a Natural Language Processing project focusing on text classification of social media posts. Key Project Features: - The goal is to build a Python coding notebook that can efficiently classify different types of text within social media posts. This will require a deep understanding of NLP principles and techniques. - The project primarily demands the use of Python for its implementation. Ideal Skills and Experience: - Expertise in Python programming is a must. - A strong background in NLP, particularly in the area of text classification, will be highly beneficial. - Prior experience working with social media text data would be a plus. If you're confident in your Python...
...seeking a skilled Python developer who can help me with a critical task: Translating PDFs. The challenge here is to make sure that the translated content in the PDFs maintains the exact same format and layout as the original documents, without any alterations. Key Requirements: - Translate both scanned and text-based PDFs/images: I need a professional who can handle both types of documents with equal proficiency. - Language Proficiency: The translation will be from English to a variety of languages. Your ability to work with any language from a dropdown menu is crucial. - High Accuracy: The translated content must retain the original meaning and context with 95+% accuracy. Ideal Skills and Experience: - Proficient in Python: You shou...
We are seeking a highly skilled and experienced Data Scraping Specialist to optimize and significantly increase the speed of our current data scraping processes. The ideal candidate will have extensive experience in web scraping, advanced knowledge of bypassing anti-scraping measures, and proficiency in utilizing cloud-based solutions for enhanced performance. Strong problem-solving and hacking skills to navigate complex web security systems are essential for this role. Responsibilities: Analyze and improve existing data scraping scripts to maximize efficiency and speed. Implement and manage cloud-based solutions (AWS, GCP, Azure, etc.) for scalable scraping tasks. Develop advanced strategies to bypass anti-scraping measures like CAPTCHAs, rate l...
I need a highly experienced programming teacher who specializes in both Java and Python. I'm seeking advanced-level guidance, mainly through the following: - One-on-one mentoring: You will provide personalized, in-depth insights catered to my capacities, skills, and learning speed. We will explore challenges and complex concepts together. Patience and exceptional communication are crucial. - Expertise in Java and Python: You must demonstrate a solid understanding and practical application of these languages in the industry. Exit profiles such as the development of complex systems, application in advanced artificial intelligence, or extensive backend management would be ideal. - Advanced Level Programming: I need a tutor who ...
I'm in need of a professional and well-rounded computer programmer to build and manage various software applications. Key Tasks: - Develop innovative web and mobile applications - Manage and maintain the software database Ideal Experience and Skills: - Strong familiarity and skill in programming languages (Java, Python or C++) preferred - Previous experience in database management - Proven track record in developing web and mobile applications While skills in Java, Python, and C++ are a bonus, I'm primarily interested in your ability to perform the tasks specified above. Show me what you've got!
I'm in need of an experienced backend developer who can deliver comprehensive solutions for a medium-scale project. The tasks to be handled include: - Database management: You should have sound knowledge and experience in managing databases efficiently. - API Integration: Proficiency in successfully integrating APIs is a must. - Server Maintenance: You will also be responsible for maintaining the server to ensure smooth operations. Though the programming languages preferred by me were not specified, having experience in Java, Python, or PHP would be advantageous. This opportunity is best suited for developers with a knack for troubleshooting and those who can guarantee smooth backend functionality even during moderate traffic.
NOTE: PLEASE MESSAGE ME IF YOU ARE AN EXPERT AND INTERSTED IN THE PROJECT. I'm currently seeking an expert in AI/Machine Learning, particularly in Natural Language Processing (NLP), who can assist in developing a solution using Python, Vector DB, Neo4j and GPT API. The main goal of this project is to create a sophisticated NLP solution that can work with text data such as documents and emails. Key Requirements: - Strong background in AI/Machine Learning, specifically in NLP. - Experience with Python, Vector DB, Neo4j and GPT API. - Ability to deploy the solution on a Local Server. Your tasks will involve: - Developing an AI/Machine Learning solution using the specified tools. - Ensuring the solution is optimiz...
Request details FOR EXPERTS WITH EXTENSIVE EXPERIENCE IN THE FIELD ONLY Objective: Scoring Algorithm for evaluating potential investments Data Source: 200+ proprietary historical records with up to 90 parameters Mentoring requested (to be worked with tech project lead and data engineer): • Data-Preprocessing (missing values, normalization, outliers) • Implementation methods for feature selection (e.g. correlation Analysis, feature importance, etc.) • Identify and run different algorithms (e.g., logistic regression, decision trees, random forests, gradient boosting, neural networks) • Details and rationale behind algorithms selection • Hyperparameter tuning and optimization • Cross-validation • Performance metrics (e.g., accu...
buen dia se necesita un un pequeño sistema para llevar a cabo la gestion de un pequeño sistema realizado en paython. dejo archivo adjunto para la explicacion.
I am seeking an experienced engineer to design and implement a two-axis machine control system that is capable of: - Effectively controlling and managing the movements of the system along two axes with a LIMITED RANGE. Your expertise in designing systems with the necessary navigation strategies and motion control algorithms will be required. - Providing real-time position feedback to the user. Your extensive understanding of feedback mechanisms particular to these types of systems is a must. Ideal expertise for the job includes: - Comprehensive knowledge in machine systems control and design. - A thorough understanding of motion control strategies. - A background in data analysis and logs processing. The machine is a Bandsaw to cut smal...
I'm having some trouble with my Windows-based soft phone engine. There are some glitches and I'd like to get them resolved. I cannot specify the exact errors or issues, but I'm looking for a professional who can troubleshoot and help me get it working smoothly. Ideal skills/experience would include: - Proficiency in Windows OS - Experience with soft phone engines - Excellent troubleshooting abilities - Strong communication skills
I need a machine learning model developed in Python. This model should be able to evaluate prospective student applications by comparing them to historical data sets. The goal is to classify and sort the new applicants efficiently. Key Requirements: - Develop a classification-based machine learning model in Python - Understand and work with historical data sets to evaluate new student applications - Deploy the model in a web application format for ease of access Ideal Skills and Experience: - Strong background in machine learning and Python - Previous experience in developing classification models - Ability to understand and work with large data sets - Prior experience with deploying machine learni...
Das Ziel des Projekts ist die Entwicklung eines Blackjack-Spiels in Python. Das Spiel wird von einer Person gegen einen computergesteuerten Dealer gespielt. Es soll eine grafische Oberfläche und Geldeinsätze enthalten. Zur Dokumentation wird ein Projektbericht geschrieben. Hier werden alle Arbeitsschritte dokumentiert und reflektiert. Die verschiedenen Code Blöcke werden kommentiert, um seine Funktionsweise besser zu erklären. Eine kurze Anleitung erklärt dem Benutzer, wie das Spiel gespielt wird
I am in need of a developer who can assist me in converting my existing Flask API into an Assistant GPT openai. The ideal candidate will be skilled in Python and GPTs Assistant and have a proficient understanding of Flask APIs. As the project involves converting the API into an Assistant GPT, experience with AI and NLP models will be a huge plus. Please note that there was a technical error in the questions, hence the repeated skips. It is highly important that the converted system maintains the functionalities of the original API while being able to run as an Assistant GPT.
...fluent in C++, to build a Windows desktop application from my edited code. The project involves: - Skill in the C++ programming language to comprehend and build upon my pre-existing source code. - Solid experience in Windows desktop application development. - Attention to detail to follow the steps correctly and ensure the application operates as intended. The project specifics and objectives will be shared with the selected freelancer. As I did not edit the functionality, it should remain as per the original code. Your role will primarily encompass building and compiling the application. Experience in both codework and software architecture is essential for success in this role. Please ensure your bid inc...
I'm in need of a skilled professional who can produce a high-quality case study report focusing on marketing strategies within the retail industry. Key Deliverables: - Thorough Analysis: The case study should delve into various effective marketing strategies within the retail sector, potentially highlighting particular successes and failures. - Practical Recommendations: Based on the case study's findings, the report should provide actionable recommendations for developing appropriate marketing strategies in the industry. Ideal Skills and Experience: - Proven Experience in Case Study Writing: You should have a strong track record of creating engaging and insightful case studies. - Retail Marketing Expertise: A deep understanding of the retail sector and its...
...DevOps engineer with expertise in both AWS and Azure platforms to create a Continuous Integration and Continuous Deployment (CI/CD) pipeline. The main duty will be integrating code changes, individual software modifications, into existing code repositories. Need to create a fully functional pipeline with tech documentation and runbooks .. Key Tasks: - Develop, test, and roll out CI/CD pipeline with supporting infrastructure as Code (Kubernetes, Docker) - Manage code releases and updates with popular orchestration tools like : Jenkins , Ansible Ideal Skills: - Proficiency with AWS and Azure cloud platforms - Strong experience with CI/CD - Adeptness with Python, PowerShell programming or any other popular scripting language This job demands the candidate...
I'm seeking professional help to rectify a problem with one of my programmes which is presently operational on a Windows 8.1 environment but doesn't launch on Windows 11. I'm not certain about the original coding language as I skipped that question, making it necessary for the freelancer to have adept skills in multiple languages, mainly in C++, Java, and Python. I'm also unsure about specific software or hardware dependencies that might be influencing the situation. However, the freelancer must have the expertise to identify and handle this potentiality. As for specific program functions, the user left a gap as well, so an experienced developer in generic software protocols and universal function...
I'm looking for a seasoned Python developer who can assist in two main areas: - Creation of PowerPoint presentation using a CSV data file - Automate the process via a public URL to upload the CSM file Creation of Powerpoint Presentation The CSV file will feature data-points in columns. A powerpoint presentation template will be provided for reference. The graphs and tables should be present as per the data-points present in CSV file. Automating the Process This is the secondary part of the job. Once we have are successfully able to convert a CSV data in PPT format, we should create a public secured link to upload the file. It should be auto-converted and file should be ready for download. The ideal candidate should be a pro...
I'm in need of a skilled Python developer to create a custom Telegram bot for me. This bot will primarily focus on automated messaging. Key requirements: - (((meeting will be in person in Kuwait))) - The bot should be programmed in Python / any - It should be able to send automated messages - integrate payment gateway - Messages include, but aren't limited to, welcome messages for new users, notifications for updates, and reminders for appointments Please consider the following skills and experiences for this project: - Strong proficiency in Python, with a good understanding of its libraries and frameworks - Experience in developing Telegram bots specifically - A solid grasp of automation a...
I'm looking for a freelancer to help me extract financial data and regulatory filings from a tax website. This involves scrapping website using the provided credentials by the client, i am looking for getting the python code as i can run the code myself in the future or integrate it to another system. Key Requirements: - I need approximately 300 data points extracted. - The output for these data points should be organized into a PDF or Word. This project is about creating an automated system to generate instant reports about a company. Only difficulty is the website has drops downs to select the period involved and in those 300 data points actually many come from the same source. Ideal Skills and Experience: - Experience i...
.The scope of this project includes: 1. Data Transmission: You should be able to help in enhancing our network to ensure that it delivers data more optimally, focusing particularly on text-based data, as this is what our UDP/IP network primarily handles. 2. Error Detection and Correction: The hiree will also have to devise new methods for detecting and correction errors within our system. We've been facing some challenges in this area that need resolution. 3. Scalable Solutions: Our network system currently connects between 10 and 50 devices. While working on this project, it is important to keep scalability in mind to accommodate potential future growth.
As the project owner, I need an experienced IT professional, proficient in working with SAGE, to develop an in-house program which will streamline the process of flattening work tickets. This involves: - Retrieving data from SAGE This process will require you to directly interface with SAGE and accurately pull the necessary data for the ticket flattening process. - Merging Similar Work Tickets The main operation to be performed on the data retrieved is to flatten work tickets by merging similar operations. This involves efficiently condensing the retrieved data by combining similar tasks into one operation. - Pushing Merged Data Back to SAGE After the operations have been merged and condensed, the data should be p...
...developer experienced in working with the Solana network and trading bots, with a mandatory requirement of being knowledgeable about the Pumpfun platform. Responsibilities: Create a bot/tool to manage trading from multiple wallets on the Pumpfun platform. Enable the bot to generate multiple wallets. Configure Solana quantities to buy per wallet. Develop an auto buy and sell bot to make a project appear legitimate with many sales and buys, thereby boosting projects. Ensure speed execution on the first buys to avoid snipers. The initial buys will be made from different wallets in varying quantities, with all transactions going through simultaneously or with a few seconds' difference. Allow for auto-tipping and prioritization in...
...frontend developer to create a cross-platform desktop application for Windows and MacOS using Electron.js. The application will manage audio, text, and video data, and will utilize websockets for backend data transfer. Key Responsibilities: Develop a responsive and efficient desktop application using , JavaScript, HTML, and CSS. Implement and integrate features to manage audio, text, and video data. Ensure smooth and secure data transfer using websockets. Conduct thorough testing to ensure the application is robust and bug-free. Work closely with stakeholders to gather requirements and iterate based on feedback. Provide comprehensive and clear code documentation. Requirements: Proven experience in developing desktop applications with Electro...
I'm in need of a skilled programmer who is adept in Python, Java, and C++. Your tasks will span database management, working with algorithms and data structures, and user interface design. Here's a further breakdown of the ideal skills and experience I'm looking for: - Programming skills: Proficient in Python, Java, and C++. Familiarity with various coding patterns and best practices. - Database management: Experience in handling large datasets, querying databases in an optimized manner, and ensuring the integrity and safety of the data. - Algorithms and Data Structures: Demonstrated understanding of algorithms and data structures. The ability to use this knowledge to solve problems efficiently is a must. ...
Looking for a Python & Active Directory Expert to create a script and test data to capture all meta data linked to and which describes the confined parameters of an AD account, group policy etc. and export to a MS Excel File. More information attached.
I'm in need of a talented designer to create a minimalist and modern facade for my clothing store. The design should be both aesthetically pleasing and practical, reflecting the essence of a contemporary retail space. Key Requirements: - The selected materials for the facade are Glass, Metal, Wood, acp, aluminium pipe, and acp alternate sheet. Experience with these materials is a must. - The desired color scheme for the facade includes violet (#47143d), golden (#b99750), and white (#ffffff). However, I'm also open to other corporate-looking 3-color palettes. Store dimentions: Height- ground level to ground floor roof= 12 feet, remaining till top= 44 feet, total = 56 feet Width- 50 feet wide (at only ground floor, there are 2 shops having front space ...
...function capable of interfacing with the Windows location services and Linux's geoclue2 to acquire the current location (longitude and latitude) on both platforms. - The function should aim to provide location data with the highest possible accuracy, utilizing GPS, Wi-Fi positioning services, and GEO IP location services. - In cases where the location data retrieval fails, the function should be designed to return an error code. The ideal candidate for this job should possess: - Proficiency in C language. - Familiarity with Windows location services and Linux's geoclue2. - Experience in working with GPS, Wi-Fi positioning, and GEO IP location services. - Capability to handle error cases efficiently with return er...
I'm in need of a proficient Python developer who can help compile a Python code, that I have acquired from GitHub, into an executable format for Windows. As the client, I expect: - Understanding the existing Python code and its dependencies - Transforming the Python code into a Windows executable file Successful freelancers should provide a detailed project proposal illustrating how they plan to compile the code to exe on a Windows operating system. Though no specific Python libraries or frameworks were mentioned, a background in Python coding and debugging is paramount. The ideal freelancer should have a deep understanding of Python code, dependencies, and experience dealing wit...
We have two sites on windows server that we would like to move to linux, without having to rewrite code for both sites. The current code is ASP and ASPX (vbscript) with Acess dbase. I am looking for someone that can make our ASP and ASPX pages to work on linux server with mysql dbase. We have a VPS on godaddy server, that we can host the two sites on. You are only qualified if you have done this many times before. You may not use our sites to "try" to do this after doing research, we only want experienced individuals on this.
...designer to create a 50x70 size advertising graphic for my business. Your design should be dynamic and attention-grabbing, following a shopping theme. Key Requirements: - Implement a shopping cart smashing through a wall. - Incorporate the slogan: "La qualità Conad, direttamente a casa tua." The prominence of the slogan should be somewhat notable but not overpowering. - Please use the color scheme: fff200, f6842a, and ed192d. Ideal Skills and Experience: - Adeptness in graphic design - Experience in designing advertising graphics - Ability to incorporate color schemes successfully - Strong understanding of prominence and subtle implication in designs. Your final design should not only structurally look good, but also capture...
...expert in SMS marketing to help establish and run a robust campaign. Details: - Platform: I plan to use an SMS marketing platform and need help setting it up properly. - Target Audience: The campaign will focus on both existing customers and new prospects. - Message Type: The primary messages will be promotional offers. Skills and Experience: - Extensive experience in setting up and running successful SMS marketing campaigns. - Proficiency with SMS marketing platforms. - Proven ability to tailor messages effectively for different audience segments. - Strong understanding of customer acquisition and retention through SMS. - Experience with loyalty programs is a plus but not mandatory. We offer SMS Marketing. Look for Affordable Platform that e...
...programmer to develop an interactive chemistry experiment for me. You may code using JavaScript, HTML5 or using Python, so experience or proficiency in this language is crucial. Key Requirements: - Users should be able to drag and drop objects using mouse or in case of mobile- fingers. - It should offer a moderate level of interactivity. This includes features such as adjusting quantities and temperatures. If a user pours something in a beaker, it should show the beaker full. If emptied, beaker is empty. - Vector images of lab equipments like Test tube, beaker, burner etc can be found online. Ideal Skills: - Proficiency in Python or JavaScript. You may use CreateJS libraries. If you are a programmer with a passion for chemistry...
I'm seeking a skilled developer to create a versatile e-signing utility. This tool should allow users to select the DSC ( usb token) inserted to the local machine and can sign PDF, XML, JSON, and Text files in bulk and with the following additional features: - Bulk Signing: It should support signing multiple files at once, with no specific limit. - Predefined Output Path: Users should have the option to assign a default output path for the signed files. - PDF Signature Display: For PDF documents, the utility should display the signature as an optional feature. The goal is to have this utility developed within a month. Ideal skills for this project include: - Proficiency in programming languages suitable for file processing (e.g. ...
...developer to create an online medical appointment platform. The platform should include the following features: - Patient Registration and Profile Management: Patients should be able to sign up, create, and manage their profiles easily. This includes providing their personal details like name, address, and contact information. - Online Appointment Booking: Patients should be able to book appointments with General practitioners, Dentists, Physiotherapist, or Nurse online. The platform should be user-friendly and intuitive. - Doctor Availability Calendar: The platform should feature a calendar that shows the availability of the medical professionals so that patients can schedule appointments accordingly. Skills and experience that would be ideal for this project inc...
I need a software program built for Windows that will allow users to view and download PDF files from Autodesk Vault 2024. This application should be user-friendly, focusing on ease of use first. Key Features: - View PDF files directly within the program - Ability to download these PDF files - Compatibility with Windows operating system Ideal freelancers for this project should have skill and experience in: - Writing software for Windows - Working with Autodesk files - Building user-friendly interfaces Urgent Need!
I am seeking an experienced Python web application developer to construct a user-friendly platform for cryptocurrency airdrop and telegram integration. The final product should be similar to notcoin. Key requirements: - User registration and verification. - Airdrop distribution capabilities. - Integration with Telegram. Professional skills and experience: -Familiarity with Python. -Past work demonstrating ability to create robust web applications. -Understanding of cryptocurrency airdrop processes. Applicants should include their relevant experience in their applications. Working examples of similar projects will be highly appreciated.
I need a tool that extracts specific content (text and images) from PDF files and adds this data into a CSV file under ...images) from PDF files and adds this data into a CSV file under designated headers. Key Requirements: - The tool should be designed specifically for Windows OS. PDF Data Extraction: - Need the tool to extract both text and images from the PDFs. CSV Insertion: - The extracted data should be sorted correctly under their respective column headers in a CSV file. Consistent PDF Structure: - It is important that the tool can handle data extraction from PDFs with a consistent structure. Ideal Skills and Experience: - Proficiency in developing Windows-based tools. - Experience with PDF data extraction. - Familiarity with CSV file manipu...
I am seeking an AI developer with significant expertise in reinforcement learning. Key Responsibilities: * Apply reinforcement learning techniques to solve complex problems. Required Skills and Experience: * Proficiency in Python. * Expert-level knowledge and hands-on experience in reinforcement learning. Only apply if you possess an excellent understanding of reinforcement learning algorithms, and Python programming. This project is demanding and requires a high level of competency, therefore, only experts in the field are sought. Your expertise will be crucial in optimizing our current models and laying down the roads for future developments.
...looking for a skilled software developer to create a Windows-compatible software application. This software should be specifically tailored to help my sales team improve their performance and to calculate their incentives. Key Requirements: - Compatibility: The software should be compatible with Windows. - Integration: There's no need for the software to be integrated with any existing systems, so you can focus solely on creating the best software for our sales team. - Data Input: The software should have the capability to import data from Excel/CSV files. This method will facilitate the input of sales data and make the software more user-friendly for our team. Ideal Skills and Experience: - Proficient in Windows soft...
I'm look...a skilled Flutter developer who can help me build a multi-platform application that is set to be a long-term project. My primary goal is to have a reliable app that includes a variety of features to provide a seamless user experience. the app which we building will be used 24/7/365 non stop always on Skills & Experience: - Proficiency in Flutter development across multiple platforms (Android & iOS , Windows , Web). - Strong understanding and experience with user authentication, push notifications, and local database management. - Prior work with Firebase authentication . - Experience in hardware and IoT integration . THIS IS A LONG TERM PROJECT IS NOT A ONE TIME THING AND IT MIGHT TAKE A YEAR TO FINISH PLEASE...
Looking for help in modifying an existing python script and related sql database table The current script - (1) scrapes company financial data from website and populates database (2) scrapes news related to keywords from google news (3)sentiment classification of news items (4)pushes data to sql database The company names and keywords are currently hardcoded in the script Requirement- (1) Company names/urls/keywords (will be provided) to be put in master table in the database (2) The script to loop through and scrape the relevant data and put in database
Avrei bisogno di un sistemista che abbia le seguenti skill: windows server, vmware, active directory, exchange, office, azure, basi su sicurezza reti. L'ideale sarebbe poter avere la presenza full time ma si potrebbe anche gestire il lavoro da remoto.
...freelancer who's great at web scraping to help with a project involving a specific website initially, with potential for more. I'll give you the specific data fields to extract. It'd be great if you: Are really good at web scraping and or Python. Know your way around MS SQL Server databases, not essential but definately an advantage. Understand how to extract data effectively. Understand the need for security and captcha integration if needed. Can work quickly since this project is a priority and needs to be done ASAP. Ultimately, I want to be able to manage the code with your ongoing help, so this could lead to a long-term partnership. I'll share the full details when needed. You will provide source cod...
I'm looking for a JavaScript developer to add the interactions to an offline web page. I have 1 image. I need in several places on it to put buttons that start the "data flow" - dashed lines (they are supposed to be pseudo animated). E.g. I press button 1 - blue data flows from source to destination, I press button 2 - red data flows from source to destination, etc. There are to be ~20 buttons and the same number of "flows" in several colors. The buttons will have to have their own names, e.g. Windows, Linux, Syslog. The whole thing is supposed to work offline, that is, as an end result I am supposed to get a zip with a directory where is, and that's all I need to...
...design a tool to view .ncz data from Netcad in ArcGIS Pro. Main Features: - Display: Vehicle data should be displayed directly and accurately without importing it into ArcGIS Pro. - Editing: While not our primary focus, being able to edit .ncz data in ArcGIS Pro would be a bonus. But it is not very important. System requirements: - The tool must be compatible with Windows 10 and above. - ArcGIS Pro 2.5 and above are required for successful integration and functionality of the tool. Use of: The tool is intended for personal projects and will be used for mapping and analysis of .ncz data in ArcGIS Pro. Essentially, I'm looking for a professional with experience in GIS, with strong knowledge of ArcGIS Pro and pos...
