Which of the following is a computer operating system?

অ্যান্টিভাইরাস বলতে সাধারণভাবে কম্পিউটারের ভাইরাস রোধ করার জন্য ব্যবহৃত একধরনের প্রোগ্রাম যা কম্পিউটারের সংরক্ষণ এলাকা বা হার্ডডিস্ক বা যে কোন রিমুভেবল ডিস্ক হতে ভাইরাস সনাক্তকরন, প্রতিরোধ ও প্রতিকার করতে পারে।

Microsoft Excel - এটিকে কেউ কেউ স্প্রেডশিট সফটওয়্যার বলে থাকেন। বিভিন্ন হিসাব সংক্রান্ত কাজের জন্য মাইক্রোসফট এক্সেল ব্যবহার করা হয়। MS WORD, WordPerfect এবং WordStar - এই তিনটিই Word Processing Software.

A debit card (also known as a bank card, plastic card or check card) is a plastic payment card that can be used instead of cash when making purchases. It is similar to a credit card, but unlike a credit card, the money is immediately transferred directly from the cardholder's bank account to pay for the transaction.

An automated teller machine (ATM) is an electronic banking outlet that allows customers to complete basic transactions without the aid of a branch representative or teller. Anyone with a credit card or debit card can access cash at most ATMs.

POST: Power On Self Test. কম্পিউটার স্টার্ট হওয়ার সময় BIOS কাজ করে। এটি BIOS এর প্রোগ্রামের একটি অংশ।

Local Area Network (LAN) consisting of multiple interconnected computers running the Windows operating system.A LAN is a type of network that covers a small geographic area, such as a campus, office building, or group of buildings. It allows computers to share resources such as files, printers, and internet connectivity.Windows is a popular operating system for LANs because it includes built-in networking features and tools for managing network connections, file sharing, and security.Therefore, it can be inferred that the network on the varsity campus is a LAN, specifically an Ethernet-based LAN running the Windows operating system.

Fortran is a programming language that was designed for scientific and engineering applications. It is one of the oldest high-level programming languages and is still widely used today for numerical computations and simulations.Java is a popular programming language that is used for developing web and mobile applications, games, and other software. Java is known for its platform independence, which means that Java programs can run on any device that has a Java Virtual Machine installed.Oracle is a company that develops and sells a wide range of software products, including databases, middleware, and enterprise software. Oracle also develops the Java programming language and provides various tools and technologies for building and deploying software applications.C++ is a programming language that is widely used for developing operating systems, device drivers, video games, and other software applications. C++ is known for its speed and efficiency, and is a popular choice for performance-critical applications. C++ is an object-oriented programming language, which means that it supports features such as classes, inheritance, and polymorphism.