2. WkTOPIC(S) 1 Overview of computer system 2 Data and Information 3 Computing Device I (pre computer age to 19 th century) 4 Computing Device I (pre computer age 19 th century) 5 Computing Devices II (20 th century to date) 6 Input Devices 7 Input Devices 8 Output Devices 9 Output Devices 10 Revision 11 Examination 12 Compilation of Results

3.  OVERVIEW OF COMPUTER SYSTEM

4. A computer is an electronic device that accepts data, processes data, stores data and produces the results in a meaningful information. Also, computer is a programmable machine that receives input, stores and manipulates data and provides output in a useful format. CONSTITUENTS OF A COMPUTER The computer system comprises two parts, namely: 1. Computer hardware 2. Computer software COMPUTER HARDWARE This refers to the physical parts of a computer that can be touched, seen and handled. Computer hardware can be divided into two, namely the system unit and peripherals. SYSTEM UNIT This is the combination of the main parts which include the central processing unit, memory modules and banks, chipsets, etc. DEFINITION OF COMPUTER

5. Computer peripherals are hardware that are not part of the system unit. They are add-on hardware to the computer to expand its capabilities or improve its performance. The computer hardware components are: keyboard, mouse, scanner, printer, monitor, plotter, earpiece, speaker, etc COMPUTER SOFTWARE Computer software can not be seen or touched or handled. The computer software can be divided into system software and application software. Examples of system software include, operating systems, compilers, interpreters, assemblers, input/output routines, diagnostic routines, job control languages, database management systems and other important utilities. APPLICATION SOFTWARE Examples of application software include Microsoft Word, Adobe PageMaker, Corel draw, Print Artist, Cool 3D,etc.

6. 1. SPEED: It is fast in operation 2. ARITHMETIC AND LOGICAL OPERATIONS: It performs the addition, subtraction, multiplication and division on the numeric data. 3. ACCURACY: Its processed out result is very accurate and reliable. 4. RELIABILITY: Computer can perform very complicated calculations without creating any problem and produces reliable results. 5. STORAGE: It has internal storage (memory) as well as external or secondary storage. 6. RETRIEVING DATA AND PROGRAMS: The data and program stored on the storage media can be retrieved very quickly for further processing. 7. AUTOMATION: It controls automatically different devices attached to it. 8. VERSATILITY (FLEXIBILITY): It performs different kind of tasks simultaneously. 9. CONSISTENCY: Computer can repeat actions consistently without loosing its concentration. 10. PRECISION: Computer performs operations accurately and precisely and also you can keep the accuracy and precision up to the level you desire.

7. ASSIGNMENT 1.Define a computer system 2.Differentiate between data and information 3.List two (2) examples each of data and information

8.  THANK YOU