Computer Systems

How to use


In terms of computing, input would mean the data coming in; when you type something on your keyboard, you are sending input into the device. clicks using the mouse would also be considered as inputs also installing software or copying files onto your computer from a disc, a USB disc, camera etc.

for example a camera is an input because it takes pictures and it can take a video as well. the picture it takes or the video it records are stored in files; these files can be copied to a computer and later edited.


Output is what comes up on a computing device which is data. common outputs are for example printed paper, sound, video and on screen documents. These let the computer communicate with the user. the most common output device id the monitor; modern monitors, where the case isn't more than a few centimeters deep, are usually liquid crystal displays (LCD) or thin film transistors (TFT) monitors.

older monitors, where the case is likely to be around 30 cm deep are cathode ray tube (CRT) monitors.


storage or memory is the place where data is held in an optical form for access by a computer processor.

storage is frequently used to mean the devices and data connected to the computer through input/output operations - that is, hard disk and tape systems and other forms of storage that don't include computer memory and in-computer storage.

some examples of storage devices would be hard drive, CD, DVD, SD cards etc.


Process is an instance of a program running in a computer. It is close in meaning to task, a term used in some operating systems. In UNIX and some other operating systems, a process is started when a program is initiated (either by using a shell command or by another program). An application that is being shared by multiple users will generally have one process at some stage of execution for each user.