ANSWERS FOR –A- Q1/ Digital Computer :A computer that performs calculations and logical operations with quantities represented as digits, usually in the binary number system - icon : asmall picture that represents a command , object, file or window status bar: is located at the bottom of a window and contains information about formatting option, errors, prompts, messages, or the status of an application a Cell? In a spreadsheet the CELL is defined as the space where a specified row and column intersect. Each CELL is assigned a name according to its COLUMN letter and ROW number. Q2/ 1- CPU: CONTROL PROCESS UNITE 2-ROM: READ ONLY MEMORY 3-OS: OPERATING SYSTEMS 4- REAL: real time operating systems 5- GRAPHICAL USER INTERFACES Q3/ Ans/1- recognizing input from the keyboard or mouse 2-sending output to the monitor 3-keeping track of files and directories on the disk 4- controlling peripheral devices such as disk drives and printers.

Q4/ Ans/ window explorer: is the program that lets you explore things" inside" your own computer. Internet explorer lets you explore things "outside" your computer— namely things on the internet. Q5/ Ans/ 1.

= K4+K6+K8 2.

=5^R3 3.

=D22*0.05 4.

=M12-M18 5.