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(bi) In computing , a computer keyboard is a typewriter- style device which uses an arrangement of buttons or keys to act as a mechanical lever or electronic switch. Following the decline of punch cards and paper tape, interaction via teleprinter- style keyboards became the main input device for computers . (bii) keyboard mouse
2ai .IT Is The study or use of systems (especially computers and telecommunications) for storing, retrieving, and the study or use of systems (especially computers and telecommunications) for storing, retrieving, and sending information. information.
2bi)An operating system or OS is a software program that enables the computer hardware to communicate and operate with the computer software . ii) window 7 , window xp, Mac OS, window vista 2c)-Error handling -Recovery from system failure -File Management -Security -Job Sequence (1a) i. Hybrid computers are computers that exhibit features of analog computers and digital computers. 1aiii) *4th Generation Computers*This generation of computer proceeds from the year 1970-1980. Improvement was made on the integrated circuit to the large scale integrated circuit or VASIC chips were computed more fight to create 20,000 circuits or more. They are equipment of several hundreds thousands of transistors and it operates a million time faster than old vacuum tube. The micro-computer falls under this generation because of its size, easy to use, low cost of purchase
5bi .A context menu (also called contextual, shortcut, and popup or pop - up menu ) is a menu in a graphical user interface (GUI) that appears upon user interaction, such as a right-click mouse operation. ii A menu bar is a graphical control element which contains drop down menus. The menu bar's purpose is to supply a common housing for window- or application-specific menus which provide access to such functions as opening files, interacting with an application, or displaying help documentation or manuals.
iii. Clip art , in the graphic arts, is pre-made images used to illustrate any medium

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