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SOFTWARE AND OPERATING SYSTEMS (COMPUTER ELEMENTS (Memory and units of…
SOFTWARE AND OPERATING SYSTEMS
Computer language and function
Binary system
The smallest unit of information we can store in a computer is called a bit. 8 bits together form a byte, different multiples of a byte are used to store information.
ASCII
We give a code to each of the letters of the alphabet. These codes consist of the figures 1 and 0.
ASCII (American Standard Code Information Interchange uses 7 bits to store up to 128 different characters
COMPUTER FUNCTIONS
We use the name hardware for the physical components of the computer systems
Computers carry out four different functions
Output of data
Storing data
Input of data
Proccesing
COMPUTER ELEMENTS
Microprocessor
Memory and units of storage
Cache memory
ROM BIOS
RAM
Storage devices
Optical discs
Solid state memory (flash)
Magnetic disks
Motherboard and connecting devices
All computer elements are connected to motherboard
Connecting external devices
Hard disk
DVD
Operating system
Manages the system resources
Applications
Presentations
Database management tools
Spreadsheets
Drawing programmes
Word processors
COMPUTER NETWORKS
Is a set of computers connected each other
Local Area Network
Wide Area Networks
Metropolitan Area Networks
Elements in a network
HUB
Switch
Adaptator
Transmission medium
Fibre optic cables
Windows operating system
