Operating Systems

Operating Systems

1. FUNCTIONS

   • At the simplest level
     • It manages software/hardware resources of the system
       • CPU
         • The system makes sure every app have ti's resources
     • It provides a stable, consistent way for applitations

2. TYPES OF OS

   • Single
     • Single-tasking system can only run one program at a time
   • Phone
     • Android Blackberry WindowsPhone IOS
       • UNIX(roots)
         • DEVELOPMENT
           • Started in 1969
           • M.I.T
             • It had
               • Many innovations
               • Many problems
             • Ken Thompson Dennis Ritchie
   • PC
     • ChromeOS Windows Linux OSX
   • Multitasking
     • Multi-tasking operating system allows more than one program to be running in concurrency
   • Multiuser
     • Multi-user operating system extends the basic concept of multi-tasking with facilities that identify processes and resources

3. Hardware

   • Collection of physical elements

4. Software

   • Machine readable instructons
     • Provided from common services