Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

20 Cards in this Set

  • Front
  • Back
Computer Versus Computer System
A computer is a machine for solving problems.
A computer system consists of at least 3 elements.
1. Harware
2. Software
3. Computer users
What are the 3 steps in Hardware Organization?
1. Input (keyboard)
2. Processing (central processing unit (CPU))
3. Output (printer)
What is Serial or Sequential Processing?
Information is processed in the order in which items are entered and stored in the computer.
What is Distributed Processing?
The information is processed by several computers connected by network.
What is Multitasking when talking about computers?
Multitasking is the computer works on more than one task at a time.
What is multiprocessing?
Multiprocessing uses two or more connected processing units.
What is Parallel Processing?
A method of processing that can only run on a computer containing two or more processors running simultaneously.
What is Pipelining?
Pipelining is a method of fetching and decoding instructions in which at any give time several program instructions are in various stages of being fetched or decoded.
The two main types of computers are Digital and Analog. What are the differences?
Digital- most common, operate on digital data through arithmetic and logic operations.
Analog- operate on continuous physical quantaties, such as electronic signals, speed, temperature and displacement.
What is an Analog-to-digital conversion (ADC)?
The ADC converts the analog signal into a sequence of numbers having finite precision.
Essential parts being: a sampler, quantizer, and coder.
What is Sampling (ADConverter)?
Sampling is the conversion of a continuous time signal into a discrete signal obtained by taking samples of the contiuous-time signal at discrete time instants.
What is Quantization (ADConverter)?
Quantization is the conversion of discrete-time, discrete-valued (digital) signal.
What is Coding (ADConverter)?
Coding is the assignment of a binary bit sequence to each discrete output from the quantizer.
What is a Binary Bit?
A Binary Bit is a single binary number. In computing it is as follows
4 Binary Bits (0.5 byte) = 1 kilobyte (K or KB)
8 Binary Bits (1 byte) = 1 megabyte (MB)
16 Binary Bits (2 bytes) = word
32 Binary Bits (4 bytes) = double word
What is a Digita-to-analog Conversion (DAC)?
The digital signal processor outputs digital data that are subsequently converted into the analog signals needed to operate analog display devises such as television monitors.
What is Input Harware?
Input Harware refers to information entered into the computer for processing.
(Ex. keyboard)
What is Output Harware?
Output is information that has been produced in a seemingly intangible form. Can be soft copy- video display, or hard copy- film or paper.
What are examples of Secondary Storage?
Magnetic Tape Storage, Magnetic Disk Storage, Optical Disk Storage.
Computers in Radiology
In 1955 computers were used to calculate radiation dose.
What is DICOM?
Digital Imaging and Communication in Medicine.