physical computing chapter 1 ffaie

What is computer?

• An electronice device operating with controlled instruction stored in the memory that programmed to accept data, process to infromation and store.

• A machine that stores and retrieves data but cannot run programs.

• An electronic device that only executes preloaded instructions without the ability to process new data or adapt its operations dynamically.

• A mechanical system that performs calculations using fixed physical components, lacking electronic memory or programmable control.

information processing

• 1. Data (input) = finished information
     Computer processing = no changes made
     Information (output) = identical to input

• 1. Data (input) = already organized reports
     Computer processing = printing documents
     Information (output) = paper copies

• 1. Data (input) = only numbers
     Computer processing = creating pictures
     Information (output) = always visual graphs

• Data (input) = facts, figures, numbers, words
  Computer processing = calculating, organizing data
  Information (output) = organized data

early personal computers at 1975 (data input with switch and light indicate result)

• Osborne

• Apple II

• Altair 8800

• IBM PC 5150

• Apple I

early personal computer at 1977 (colour monitor)

• Xerox

• Apple Lisa

• Apple II

• IBM PC 5150

early personal computers at April 1981 (first portable computer and run spreadsheet and word software)

• Apple Macintosh

• Xerox

• Osborne

• Apple II

early personal computers at August 1981 (for business and consumers)

• IBM PC 5150

• Apple Lisa

• Apple Macintosh

• Xerox

• Apple II

What is computer?

• • Only input device

  • No memory or CPU

  • Direct connection from input to output

  • No storage capability

• • Magic processing unit

  • Imaginary storage

  • Thought-based input

  • Dream output system

• • Input device

  • Memory/RAM

  • CPU

  • Storage device

  • Output device

• • Output device only

  • Memory that never forgets (no RAM volatility)

  • CPU that doesn't process

  • Storage that changes data randomly

early graphical user interface at 1972 (not sold commercially)

• Apple II

• Osborne

• Apple Lisa

• Xerox

• IBM PC 5150

early graphical user interface at 1983 first successful GUI

• Altair 8800

• Apple Macintosh

• Apple Lisa

• Xerox

earlygraphical user interface (best seller)

• Xerox

• Apple Lisa

• Apple Macintosh

• IBM PC 5150

• Osborne