COMPUTERS- this invention has spread all other the world. It has helped save important documents and it can save images. This kind of technology easily gives you different kinds of solutions, you can find images, videos and can connect to with your family or friends around the world.
http://www.techterms.com/definition/computer
HARDWARE- the hardware include the computer you're using to view this page, the hard drive that has this page stored on it, and of course the mouse you used to click on a link to bring you to this page.
http://www.webopedia.com/TERM/H/hardware.html
SOFTWARE- Computer software is a general term that describes computer programs. Related terms such as software programs, applications, scripts, and instruction sets all fall under the category of computer software. Therefore,installing new programs or applications on your computer is synonymous with installing new software on your computers
http://searchsoa.techtarget.com/definition/software
PROGRAM- Programs can be characterized as interactive or batch in terms of what drives them and how continuously they run. An application program, which runs on the operating system and does a specific job such as word processing.
http://www.answers.com/topic/program
INPUT- it can be something as simple as moving the mouse or clicking the mouse button or it can be as complex as scanning a document or downloading photos from a digital camera.
http://www.businessdictionary.com/definition/input.html
