COMPUTER STUDIES/INFORMATION AND COMMUNICATION TECHNOLOGY

Storage Technologies and their Devices There are basically two types of storage, one is static or non-volatile storage. There are basically three kinds of storage technologies which are:

CENTRAL PROCESSING UNIT CPU is the hardware part of a computer that carries out the instruction of a computer program by performing the basic arithmetic, logical and input/output operations of the system. CPU is the brain of the computer where most operations,

  COMPUTING DEVICES I (PRE – COMPUTER AGE TO 19TH CENTURY) Abacus Features and components Abacus was invented around 500 BC. It was made up of strings or wires, frames and beads. Modern Abacus uses sliding beads in columns that are divided into two by a center bar. The upper part is called the heaven and each of the two beads (representing the two hands) is worth 5 when moved

  DATA AND INFORMATION Data Data are raw facts and figures without any added interpretation. Data can be defined as a representation of facts or concepts in a formalized manner which should be suited for interpretation or processing by

OVERVIEW OF COMPUTER SYSTEM WHAT IS COMPUTER? Definition of a Computer A computer can be defined as an electronic machine (device) which under the control of a stored program accepts data, stores the data, processes the data and brings out the results as information. Computer is an electronic device that accepts data inform of text, number, picture and sound through input devices, processes the data through processing device and produces result also known as information in a specified format through the help of installed program at a very fast speed. Computer as an IPO system Computer performs 4 key operations on data a.   Input        b.   Processing       c.   Output        d.   Storage Input:  data are entered into the computer through the input unit. Data are raw facts that are to be processed into meaningful form. Processing:  Computer performs cert...

THE INTERNET:  SEARCH ENGINES   A search engine is an information retrieval system designed to help find information stored on a computer system such as the World Wide Web (WWW). A search engine is a program that searches through a large volume of data to retrieve information, according to the specific instruction it has been given.

  Database Packages   ✔       A database is a collection of information that is organised in a logical way so that it can be easily accessed, managed and updated.

THE   INTERNET  BROWSER A   web/internet   browser   is   a   software   program   that   allows   you   to   access   and   view   web   pages.   The   web   browser   software   is   built   on   the   hyperlinks,   which   allows   users   to   point and click with a mouse in order to jump from one document to another in whatever order they desire.

THE INTERNET   Internet is a collection of computers all linked together to share information worldwide. It is one of the largest networks that link trillions of computers all over the world. You can access this network via communication devices and media such as modems, cable, telephone lines and satellite.

  Operating System Introduction : An operating system performs these services for applications:   1. The OS determines which applications should run in what order and how much time should be allowed for each application before giving another application a turn during multitasking. 2. The OS manages the sharing of internal memory among multiple applications. 3. It handles input and output to and from attached hardware devices, such as hard disks, printers, and dial-up ports. 4. The OS sends messages to each application or interactive user (or to a system operator) about the status of operation and any errors that may have occurred. 5. It can offload the management of what are called batch jobs (for example, printing) so that the initiating application is freed from this work. The application programs make use of the operating system by ...