SS 1 Computer Studies (1st, 2nd & 3rd Term)

Sections of the Keyboard The Keyboard is divided into five sections; I.            Alphanumeric keys( Alphabet and Numbers): consist of alphabet (a-z) and numbers (0-9) II.            Function keys F1-f12: they are… Read More »Computer Input devices and Output devices

MEANING OF DATA Raw facts or entity which no meaning has been attached to because it has not been processed is referred to as DATA. Data could be facts about… Read More »Data and Information

PRINTER There are three types of computer printers: Inkjet: Inkjet printers spray a jet of special ink on the surface to create an ink under control of electric field. Ink… Read More »Output Devices II

OUTPUT DEVICES Computer output device is a device that releases the processed data from the computer to either the user or any of the storage devices. There are many devices… Read More »Computer Output Devices

Sections of the Keyboard The Keyboard is divided into five sections; I.            Alphanumeric keys( Alphabet and Numbers): consist of alphabet (a-z) and numbers (0-9) II.            Function keys F1-f12: they are… Read More »Computer Input Devices

An Input Device is any computer hardware equipment used to feed or send data into the main storage of a computer for processing. Many input devices can be classified into… Read More »Computer Input Devices

HISTORICAL DEVELOPMENT OF COMPUTING DEVICES( 20th  Century)  These generations of computers witnessed the first set of computers that used vacuum tubes for circuitry and magnetic drum for memory and were… Read More »HISTORICAL DEVELOPMENT OF COMPUTING DEVICES

HISTORICAL DEVELOPMENT OF COMPUTING DEVICES 2 (PRE COMPUTER AGE  TO 19TH CENTURY) JACQUARD’S LOOM (FEATURES, COMPONENT AND USES) The Jacquard loom is a mechanical loom, invented by Joseph Marie Jacquard… Read More »HISTORICAL DEVELOPMENT OF COMPUTING DEVICES 2

HISTORICAL DEVELOPMENT OF COMPUTING DEVICES The origin of computers dates back to when our fore fathers used their early calculating devices to count. For example Counting with fingers and toes:… Read More »HISTORICAL DEVELOPMENT OF COMPUTING DEVICES

Definition of Computer hardware This refers to the physical units or components which make up the computer configuration. The term hardware refers to the tangible parts of a computer that… Read More »Computer Hardware and Software

A computer is a special multi-purpose electronic device (Machine) that is capable of receiving instruction (data), storing and processing it and giving a desire result as output accurately at an… Read More »Constituents Parts of a Computer System

These are gates that are formed from combination of two logic gates. There are two types of alternative logic gate: NAND GATE A NAND gate is the combination of an… Read More »Logic Gate

LOGIC EQUATIONS Aside representing the functioning of a logic gate with truth table and grammatical definition, the use of logic equations can be used not only to represent logic gates… Read More »Logic Gate

LOGIC GATES A logic gate is an elementary building block of a digital circuit. Most Logic gates have two inputs and one output. At any given moment, every terminal is… Read More »Logic Circuit

Differences between primary and secondary memory Primary storage devices Secondary storage devices 1 These devices are temporary. These devices are permanent. 2 These devices are expensive. These devices are cheaper.… Read More »Differences between primary and secondary memory

SECONDARY MEMORY Secondary memory or storage is the non – volatile memory that stored externally from the computer. A secondary – storage medium is usually used for the storage of… Read More »Types of Secondary Storage

 Memory is the part of the computer that holds data and instructions for processing. It stores program and instructions or data for only as long as the program they pertain… Read More »Memory Unit

 The main objective of the CPU is to perform mathematical calculations on binary numbers; still there are other goals of using CPU as well. The CPU comprises many hardware components… Read More »Central Processing Unit

Computer Hardware This is the collection of physical elements that constitutes a computer system. Computer hardware refers to the physical parts or components of a computer such the monitor, mouse,… Read More »OVERVIEW OF COMPUTER HARDWARE