Computer Science Archives - Free ZIMSEC & Cambridge Revision Notes

O Level Computer Science: Hardware and Software: Introduction

ZIMSEC O Level Computer Science Notes: Hardware and Software: Introduction

A computer system is made up of two important elements which are hardware and software.
A computer is defined as an electronic device capable of accepting data (raw facts and figures)as input, processes (works on it) produces information (data converted into a meaningful […]

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By garikaib|2022-09-15T12:29:41+02:00January 24th, 2023|Computer Science, Notes, Ordinary Level Notes|

ZIMSEC O Level Computer Science Notes: Hardware: ATM

An automated teller machine (ATM) is an electronic device that enables customers of financial institutions to perform financial transactions, such as cash withdrawals, deposits, funds transfers, or account information inquiries, at any time and without the need for direct interaction with bank staff.
Anyone with a […]

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By garikaib|2022-09-15T12:29:41+02:00January 24th, 2023|Computer Science, Notes, Ordinary Level Notes|

ZIMSEC O Level Computer Science Notes: Hardware: POS

A point-of-sale (POS) terminal is a hardware system for processing payments at retail locations.
Software to read magnetic strips of credit and debit cards is embedded in the hardware.
It usually consists of the following units for displaying the order total, product weight, etc. and other hardware […]

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By garikaib|2022-09-15T12:29:41+02:00January 24th, 2023|Computer Science, Notes, Ordinary Level Notes|

ZIMSEC O Level Computer Science Notes: Software: Operating System

An operating system, or “OS,” is software that communicates with the hardware and allows other programs to run.
It consists of system software, or the fundamental files your computer needs to boot up and function.
Every desktop computer, tablet, and smartphone includes an operating system that […]

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By garikaib|2022-09-15T12:29:41+02:00January 24th, 2023|Computer Science, Notes, Ordinary Level Notes|

ZIMSEC O Level Computer Science Notes: Software: Operating System: Personal Computer Operating System

A personal computer operating system is a software which is initially installed in a personal computer which has a role of controlling the operation of a computer and directing the processing of programs as by assigning storage space in memory […]

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