Module 4: Computer Hardware
The first typewriters = Christopher Latham Sholes (1819-1890) in 1868, had their keys in alphabetic order.
Sholes created the QWERTY layout in 1873. The QWERTY keyboard gets its name from the order of keys in
the top row.
Computers, module 7
A standard protocol called the Transmission Control Protocol/Internet Protocol (TCP/IP) was implemented in
1983 as a standard means of communicating over a network, thus giving birth to the term Internet.
TCP/IP can be used within a si
1.1 Role of an Operating System
The Operating System (OS) acts as an intermediary between the user and the physical hardware of
1.1.1 Running Programs
Operating system provides an interface layer for programs so that the same comman
Module 5 - Spreadsheets
The first spreadsheet application was VisiCalc
Spreadsheet packages assist in numerical analysis by:
virtually eliminating the time-lag between conception and realisation of ideas;
easing the exploration of options and the play
Type of Network
Local Area Network (LAN)
Refers to a network that covers only a small area,
usually just a few kilometres at most.
Metropolitan Area Network (MAN)
Network that spans a complete city.
Wide Area Network (WAN)
Stretches across a count
Module 3: History of Computing
1. Before World War II
- The first machines that were used for computation were simple mechanical adding machines.
Abacus first computer?
The abacus existed before numbers (the Hindu-Arabic numeral system) were conceived.
Module 2: Word Processing
CTRL + C
CTRL + X
CTRL + V
CTRL + O
CTRL + S
CTRL + P
CTRL + B
CTRL + I
CTRL + U
CTRL + L
CRTL + R
CTRL + E
CTRL + J
Moving within Document
Morality involves informal rules of conduct for public interaction and an understanding of whether such
conduct is good or bad.
Ethics is the study of moral, social and legal issues which affect a person or a group in society.
Computer Ethics is the study