A computer is an electronic device that can store, retrieve, and process data. It accepts information in the form of digitalized data and manipulates it based on a program, software, or sequence of instructions on how the data is to be processed. Computers can perform a variety of tasks, such as typing documents, sending emails, playing games, browsing the web, editing or creating spreadsheets, presentations, and videos. They come in many shapes and sizes and perform different functions in our daily lives, such as withdrawing cash from an ATM, scanning groceries at the store, or using a calculator. Computers have two things in common: hardware and software. Hardware refers to the physical components of a computer, such as the mouse, keyboard, and monitor, while software refers to the programs and applications that run on the computer. Computers can be classified based on their functionality, such as analog computers, digital computers, personal computers, workstations, and laptops.