COMPUTER STUDIES/INFORMATION AND COMMUNICATION TECHNOLOGY

INTRODUCTION TO WWW Meaning and Definition of WWW WWW (World Wide Web) is part of the internet that contains linked text, image, sound, and video documents. It is also define as an information space where documents and other web resources are identified by URLs, interlinked by hypertext

NETWORK DEVICES Definition of Network Devices Network devices are components used to connect computer or other electronic devices together so that they can share files or resources. Some network devices are examined below:

NETWORKING Definition of Network and Networking A computer network consists of a collection of computers, printers and other equipment that are connected together so that they can communicate with each other. It  is also  defined  as a group of two or more

COMPUTING DEVICES II  (20TH CENTURY TILL DATE) ENIAC In 1946, John Mauchly and J. Presper Eckert completed the ENIAC  (Electronic Numerical integrator and Computer) . It was the first general purpose computer. ENIAC contained 18,000 vacuum tubes, weighed 30 tons, occupied 1800 square feet of floor space and required 160 kilowatts of electrical power. The ENIAC used punched card for input and output. ENIAC was used by US for hydrogen bomb project and programming. EDVAC Features and components The EDVAC  (Electronic Discrete Variable Automatic Computer)  is the successor of the ENIAC and was made by the same designers: John Mauchly and Presper Eckert in 1949.  Unlike its predecessor the ENIAC, it was binary rather than decimal. It was the first designed stored program computer with memory capacity of 1000 words (later set to 1,024 words, thus giving a memory, in modern terms, of 5.5 kilobytes). It contains 6,000 vacuum tubes and consumed 56 KW of power and covered 490 square feet of floo

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 and circuits, but also with the usage of some theorems and equivalences, to reduce the number of terms involved, simplifying the equation.

  Memory Unit The memory unit is the part of the computer that holds data and instructions for processing. Although it is closely associated with the CPU. In actual fact, it is separate from it. Memory unit associated with CPU is also called Primary Storage

LOGIC CIRCUIT  A logic gate is an elementary building block of a digital circuit. It processes one or more input signal in a logical fashion. Depending on the input value or voltage, the logic gate will either output a value of ‘1’ for ON or a value of ‘0’ for OFF.

Unit of storage The storage capacity is the amount of space available for the storage of data in a particular storage media. The storage unit includes: ·     Bits: a bit is a contraction of the word “binary digit” and is denoted with