OCR computing keywords

HideShow resource information
Computer system
A combination of hardware and software components that allow input processing and output of data.
1 of 30
Hardware
Physical components that make up a computer system
2 of 30
software
the programs that run on a computer
3 of 30
Input devices
hardware devices that take real world data and convert it into digital form that can be stored on a computer. eg keyboard ,mouse.
4 of 30
Output Devices
hardware devices that use digital data from a computer to produce a form that a person can understand. eg monitors and printers.
5 of 30
Reliability
How much you can depend on a computer system being available when you need it.
6 of 30
Availability
The period of time that a system is operational, (usually expressed as a percentage over time).
7 of 30
Mean time between failure (MTBF)
a measure of availability often quoted by hardware manufactures
8 of 30
redundancy
spare hardware components are built into a system so in the event of a component failing, the system can swap over to the spare one.
9 of 30
disaster recovery
where a company has plans to replace a system quickly if there is a catastrophe. Its designed to minimise the time the system is down.
10 of 30
Bit
Bit -A Single binary digit (1 or 0)
11 of 30
Byte
A byte is 8 Bits (8 binary digits of 1 or 0)
12 of 30
Nibble
Nibble is half of a byte (4 bits)
13 of 30
Kilobyte
1024 bytes / 2(power10) bytes
14 of 30
Megabyte
1024 kilobytes / 2(power 20) bytes
15 of 30
Gigabytes
1024 megabytes / 2(power 30) bytes
16 of 30
Terabyte
1024 gigabytes / 2(power 40) bytes
17 of 30
Binary
binary is base 2 number system, used by computers. binary uses the digits 1 and 0.
18 of 30
Denary
Denary is base 10 number system, how we normally count. it uses digits 0 to 9.
19 of 30
hexadecimal ( hex)
base 16 number system used by humans to represent groups of four bits at a time. uses digits 0 to F .
20 of 30
Overflow
when the result of a numeric calculation is too large to be stored in the space reserved for that type of data.
21 of 30
character set
a set of characters(symbols) represented by a computer. ( eg letters, punctuation an some control characters ). each character is represented by a numerical code that is stored as a binary digit.
22 of 30
ASCII
ASCII is American standard code for Information Interchange. its a 7 bit character set used by PC's.
23 of 30
EBCDIC (pr. eb-sid-ic)
extended binary coded decimal interchange code. its an 8 bit character set user by older miniframes.
24 of 30
Unicode
a 16 bit character set that allows many more characters to be coded.
25 of 30
Instructions set
the group of instructions available for that specific processor to use. the number of instructions available will depend on the number of bits used.
26 of 30
Op code
the group of bits in an instruction that represent the operation such as EAT , MOVE or TURN
27 of 30
Compiler
A piece of systems software that converts a program written in a high level programming language into machine code( binary)
28 of 30
Machine code
a binary representation of a program
29 of 30
high level programming language
a programming language written in constructs using language we can understand. eg Delphi ,Visual basic, Java etc
30 of 30

Other cards in this set

Card 2

Front

Physical components that make up a computer system

Back

Hardware

Card 3

Front

the programs that run on a computer

Back

Preview of the back of card 3

Card 4

Front

hardware devices that take real world data and convert it into digital form that can be stored on a computer. eg keyboard ,mouse.

Back

Preview of the back of card 4

Card 5

Front

hardware devices that use digital data from a computer to produce a form that a person can understand. eg monitors and printers.

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Computing resources:

See all Computing resources »See all Computer systems resources »