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12 Cards in this Set

  • Front
  • Back
what is a computer system?
-group of devices
-programmed with a set of instructions
-accept raw data (input)
-process into useful information (output)
what is hardware?
electric, electronic, and mechanical components used in processing data
what is software?
set of intructions that enable hardware to process info
what is cpu?
central processing unit
-where data is transformed into info
name and describe 4 classifications of computers
1) microcomputers - small, single user, and least expensive
2) Mainframe - consists of host and user terminals
3)supercomputer - fast and expensive -> computer animation

4) Network of microcomputers - users may work locally or in the shared network environment
what is the smallest unit of storage ?
a bit
what is a computer word size?
the number of bits which the cpu can manipulate at once - depends on size of the cpu registers and data bus lines
-starts with eight-bit (1 byte) and doubles till 8 bytes
how many bits does nbits generate?
2^n different bits
what is BCD?
binary coded decimal
-developed by ibm
-only uppwercase characters, numbers some symbols represented
what is EBCDIC?
Extended Binary Coded Decimal Interchange Code
-representing up to 256 characters
what is ASCII?
American Standard Code for Information Interchange
-improved to 8bit from 7bit
-developed by ANSI (American National standardes Institute)
what is Latin 1?
appends 128 additional codes to the original ascii 128