Software

Software

1. System Software

   • Operating System
     • Acts as an interface between the user and the computer
     • Provides a virtual machine
     • It hides the complexity of the hardware from the user
   • Library Programs
     • Collection of compiled routines that other programs can use
     • Pascal has the StrUtils library makes many functions available
   • Utility Programs
     • Disk formatter
     • File compression
     • Firewall
   • Programming Translators
     • Assembler
     • Compiler
     • Interpreter

2. Application Software

   • Gerneral Purpose Application Software
     • Word Proccessor
     • Spreadsheet
     • Database Management
   • Special Purpose Application Software
     • Payroll
     • Web Browser
     • Tax Calculator
   • Bespoke Application Software
     • Air Traffic Control
     • BBC TV licensing service
     • London Congestion
     • Charging Scheme