Linus Torvalds
Ø Best known as the Linux creator
q The Linux operating system is the best-known example of open source software.
q Today Linux powers Web servers, film and animation workstations, scientific supercomputers, and a handful of handhelds.
Multiple User Operating Systems: UNIX and Linux
Ø UNIX was developed at Bell Labs before personal computers were available.
Ø Linux was created by Linus Torvalds and continues to be a work-in-progress.
UNIX allows a timesharing computer to communicate with several other computers or terminals at once.
Hardware and Software Platforms
| Windows Vista Windows Server 2003 Windows XP Windows ME Microsoft Windows CE | Mac OS X (10) Mac OS 9 Linux, Sun Solaris, and other UNIX variations |
Files can be scattered all over the system, which often makes data management difficult.
Ø One solution to this problem is to organize data files logically.
Ø Both Windows and the Mac support the notion of common system folders with self-explanatory names:
q My Documents (Documents)
q My Pictures (Pictures)
q My Music (Music)
File-Management Utilities
q View, rename, copy, move, and delete files and folders
q Hierarchies help with organization
q Help with locating a file
q Get size, file type, and last modification date
Managing Files from Applications
q Operations: Open, Save As, Save and Close
Defragmentation
Popular operating systems include Windows, Mac OS X, UNIX, and Linux.
The user interface is a critical communication component in operating systems, applications, programming languages, and utilities.
Tomorrow’s interfaces are likely to rely on three-dimensional graphics and animation to create virtual realities.
Software piracy is a major concern in the computer industry.
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