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COMPUTER SYSTEM 2.1 SYSTEM CONCEPT (INFORMATION PROCESSING CYCLE (INPUT-…
COMPUTER SYSTEM
2.1 SYSTEM CONCEPT
DATA REPRESENTATION
BIT
Single binary digit 0 or 1
Represents an electrical state on or off;
where bit 1 represents on and bit 0 represents
off.
BYTE
Is eight bits that are grouped together as
a unit.
Represents one character such as a
digit, a letter, a punctuation mark or any
symbol in computer.
COMPUTER
An electronic device that can
accept data, process the data, produce results,
and store results for future use.
FUNCTION
Data is a collection of unprocessed text, numbers,
images, audio, and video.
Information is data that is organized, meaningful,
and useful.
Computers process data into information
COMPONENTS
A computer uses hardware and software to
process data into information.
Hardware is the electric, electronic, and
mechanical equipment that makes up a computer.
Software is a series of instructions that tells
hardware how to perform tasks
INFORMATION PROCESSING CYCLE
INPUT- Accept data or instruction into the
computer
PROCESS - Perform operations on the data
OUTPUT - Present the results of data
processing
STORAGE - Save data, program, or output
for future use
STORAGE CAPACITY
Refers to a number of bytes a
storage medium can hold.
KB (Kilobyte)
MB (Megabyte)
GB (Gigabyte)
TB (Terabyte)
PB (Petabyte)
1 KB = 1024 bytes (210 bytes)
1 MB = 1024 KB (220 bytes)
1 GB = 1024 MB (230 bytes)
1 TB = 1024 GB (240 bytes)
1 PB = 1024 TB (250 bytes)
