Data Processing/Information Processing

Operating System

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. The operating system is a component of the system… Read More »Operating System

COMPUTER SAFETY MEASURES

Anti-virus software is your computer’s best defence against malware (e.g., viruses, Trojan horses, worms, spyware) – install and update anti-virus software on your computer and regularly scan your computer to… Read More »COMPUTER SAFETY MEASURES

MEANS OF TRANSMITTING INFORMATION

There are various means of transmitting information, and the choice of method often depends on the nature of the information, the distance it needs to travel, and the desired speed… Read More »MEANS OF TRANSMITTING INFORMATION

Process of information transmission

A chart, also called a graph, is a graphical representation of data, in which “the data is represented by symbols, such as bars in a bar chart, lines in a… Read More »Process of information transmission

Information processing – Full Explanation

Information processing is the acquisition, recording, organization, retrieval, display and dissemination of information. Information processing could also be referred to as the manipulation of digitalized information by computers and other… Read More »Information processing – Full Explanation

Internet Abuse

Internet abuse refers to improper use of the Internet and may include: Internet has so many advantages if it is used positively without caring about any false means and attractive… Read More »Internet Abuse

Internet – FULL EXPLANATION

The Internet is the global system of interconnected computer networks that use the Internet protocol suite (TCP/IP) to link billions of devices worldwide. It is a network of networks that consists of millions of private, public, academic,… Read More »Internet – FULL EXPLANATION

File Organization

A collection of data or information that has a name, called the filename. Almost all information stored in a computer must be in a file. There are many different types of files: data files, text files ,program files, directory files, and so on.… Read More »File Organization

Querying Relational Database

SELECT Query Basics Why MS-Access? A number of RDBMS vendors provide a GUI to aid their users in developing queries. These can be particularly helpful to novice users as it… Read More »Querying Relational Database

RELATIONAL MODEL – Integrity Constraints

Integrity Constraints over Relations An integrity constraint (IC) is a condition specified on a database schema and restricts the data that can be stored in an instance of the database.… Read More »RELATIONAL MODEL – Integrity Constraints

Relational database

A relational database is a collection of data items organized as a set of formally-described tables from which data can be accessed or reassembled in many different ways without having… Read More »Relational database

Computer Professional Bodies

The following are some of the prominent computer professional bodies in Nigeria. Nigeria Computer Society (NCS) Institute Of Management Information System. (IMIS) Computer Professional Registration Council of Nigeria (CPN) Information… Read More »Computer Professional Bodies

CAREER OPPORTUNITIES IN DATA PROCESSING

Computer personnel are those who assemble, install, repair and operate the computer system. The term equally includes those people who make their living out of the computer industry. They include… Read More »CAREER OPPORTUNITIES IN DATA PROCESSING

SOURCES OF COMPUTER INFECTION VIRUS | WARNING SIGNS, PREVENTIVE, ANTIVIRUS

There are various ways in which viruses can attack computer system; When you download or open attachment in e-mail message or by instant messaging messages Installing unknown program from unreliable… Read More »SOURCES OF COMPUTER INFECTION VIRUS | WARNING SIGNS, PREVENTIVE, ANTIVIRUS

COMPUTER VIRUS | TYPES, EXAMPLES, EFFECTS

Computer virus is a software program written with malicious intentions. They are intentionally written by some software developer to cause severe damage for the computer, programs, and data files in… Read More »COMPUTER VIRUS | TYPES, EXAMPLES, EFFECTS

INTERNET | BENEFITS, FUNCTIONS, ABUSE, SECURITY

The Origins of the internet dates back to1960s when the United State funded research projects of its military agencies to build robust, fault-tolerant and distributed computer network. The internet is… Read More »INTERNET | BENEFITS, FUNCTIONS, ABUSE, SECURITY

NETWORKING | LAN, MAN, WAN, SERVER, TOPOLOGY

A computer network is a system that connects two or more computers together using a communication link. It describes a processing system with a number of independent, relatively low-speed, online,… Read More »NETWORKING | LAN, MAN, WAN, SERVER, TOPOLOGY