(i) Data: Data is unprocessed information or a raw fact, figure. Datum is a singular form of data.
(ii) Information: Information can is processed data or collection of data arranged in a meaningful way. It is a collection of related items of data and it is treated as a unit by computer.
TYPES OF DATA
i) Numeric Data e.g. Numbers i.e. 0 – 9
ii) Alphabetic Data e.g. Letters i.e. A – Z
iii) Alphanumeric Data: e.g. Alphabet and Numbers i.e. G8 EKO 2020
iv) Audio Data: Audio data is voice sent into computer. E.g. sounds played on computer
v) Graphic Data: It is called visual data e.g. pictures sent into computer with the aid of a scanner.
WAYS OF HANDLING DATA
i) Recording: This is storage of data in recording devices like tape and recorder
ii) Computer Storage: Typing and storing in computer.
iii) Writing: Writing on paper.
iv) Drawing: Drawing of imagesv) Signs: The use signage to keep data
CLASSIFICATION OF COMPUTER BY TYPE
i) Analogue Computer: It represents data by measurement of a continuously changing variable e.g. thermometer, speedometer etc.
ii) Digital Computer: It is a machine that performs calculation by means of digital or discrete numbers e.g. digital clock, pagers and calculator.
iii) Hybrid Computer: It is a type of computer that uses both analog method and digital e.g. Robot, Stethoscope.
CLASSIFICATION OF COMPUTER BY SIZE
i) Super Computer: It is large in size, very fast, expensive and it is used for complex or high level mathematical calculations e.g. Cyber 205, IBM 3090, ETA-10.
ii) Mainframe Computer: It is very powerful and very big in size e.g. IBM3601370, NCRV-8800.
iii) Mini Computer: It is a mid-level computer in between the largest mainframe multi-user systems and the smallest single-user system microcomputers built to perform complex computations e.g. PDP 11, NCR 9300, HP 3000 etc.
iv) Micro Computer: Micro computer is also called Personal Computer (PC) that comes in small sizes e.g. Desktop, Notebook, Palmtop and Laptop.
CLASSIFICATION OF COMPUTER BY USAGE
i) Multi-user computer system
ii) Single-user computer system
APPLICATION OF ICT IN EVERYDAY LIFE
(i) Uses of ICT in everyday activities
– For communication
– For timing and control
– For information processing
– For information management
(ii) Impact of ICT in the society
– Effective human interaction
– Access to information
– Serves as global village
– Innovative way of interaction
– Flexibly in interaction
– Media Integration