Fall 2014 Lake
Software
Comparing Operating Operating Systems Run wide variety of tasks
Systems Run when computer is started
Only one OS operates at a time Applications Al Lake Run specified tasks
LBCC Only run when initiated
Fall 2014 Can run multiple applications at a time
Fall 2014 Lake 2
What does Operating System do Most Widely Used OSes
Manages all the Desktop resource in a computer Windows (including processor, Mac OS memory, i/o devices) Unix/Linux and their siblings. Provides an interface between the hardware PDA (Personal Digital Assistant) and application Palm software. Pocket PC
Embedded Linux OS
Fall 2014 Lake 3 Fall 2014 Lake 4
Most Widely Used OS Macintosh Operating System
Desktop OS Statistics OS % Evolved from 1984’s original Mac OS Other Windows 7 51.71% 1984 Mac was first commercial computer with Linux Graphical User Interface (GUI) and mouse Windows Vista Windows XP 23.87% Currently Mac OS 9, Mac OS X OS X Windows 8/8.1 12.26% Windows 8/8.1 Inventor of trash can, alias (shortcut), pull- OS X 6.38% Windows XP down menus, etc. Windows Vista 3.07% Windows 7 Linux 1.64% 0.00% 20.00% 40.00% 60.00% Other 1.07% Evolution is progressive change or improvement
Fall 2014 Lake 5 Fall 2014 Lake 6
CS140M 1 Fall 2014 Lake
Mac OS Details Windows OS
Control Strip Windows is built on top of MS-DOS, the Alias (same as shortcut) Microsoft Disk Operating System, based on QDOS. Single-button Mouse (can be customized) Windows 1.0 very delayed, very poor quality Sherlock 2 (global search utility, copied in Windows 2000 and Windows ME) Windows 3.1 (circa 1992) was the first usable version, but was still very limited in Easy to use, hard to troubleshoot comparison to Mac OS 6 Windows 95 revolutionary for Intel-based computers, but, just a copy of Mac OS Revolution is non-progressive change, major drastic change
Fall 2014 Lake 7 Fall 2014 Lake 8
Windows 95 Multi-tasking
Took Recycle Bin, The ability to run several programs at the same time. Shortcuts, and Menu System from Macintosh OS CPU can only run one program at a time. OS will switch programs for it. Since the switching is so fast, Excellent user-friendliness for operations it looks like running multiple programs at the same
Like Mac OS, suffers time. from un-friendliness for Two multi-task mechanism troubleshooting Cooperative multi-tasking (program voluntarily releases Excellent multi-tasking CPU ) capabilities (run multiple Preemptive multi-tasking. (OS deprives the CPU control programs) the OS uses when time is up) virtual memory
Fall 2014 Lake 9 Fall 2014 Lake 10
Windows History Windows XP
Windows 95 for home machines, stable, simple Windows NT 4.0 for business/office computers Released 2002 Windows 98 replaces 95, very unstable, just a facelift Home version and business version based on W98 Release 2 much better, but still lacked as an OS same OS Windows 2000 replaces Win NT 4.0 Previously, Win NT & Win 95 were different, Incredibly stable, not very backwards compatible Windows 2000 and Windows ME were different Windows ME (Millennium Edition) replaced W98 (fall 2000) Win XP is more stable than Win 98/ME, not Almost no new features as stable as Windows 2000 Seems a little more stable than W98 Faster Startup
Fall 2014 Lake 11 Fall 2014 Lake 12
CS140M 2 Fall 2014 Lake
Linux and Unix Ranking the Operating Systems
Unix was the first usable OS and still Stability widely used today. It runs on special Unix Ease of Use computers, e.g. Sun, Silicon Graphics, Windows 7 Windows 7 HP, DEC Linux Mac OS 9 Mac OS X Windows ME/98/95 Linux was developed by Linus Torvalds Windows 2000 Mac OS X Both are based on a stable command line Windows 8 Windows XP Pro OS Windows 2000/NT Windows 8 Linux By comparison, Windows based on Mac OS 9 Unix unstable command line OS, MS-DOS Windows XP Home DOS Both Linux and Unix use an X-Windows Windows 98 GUI DOS Windows 95 Windows ME/Vista Fall 2014 Lake 13 Fall 2014 Lake 14
Future of Operating Systems Assignment
Microsoft must address stability problems in home Install Windows 7 computers – Windows XP was a small step Turn-in: Linux becomes more popular, but only for advanced users and in server market. Make a screen dump of the Computer Properties Macintosh’s market penetration more based on E-mail screen dump to [email protected] hardware appeal rather than software
Fall 2014 Lake 15 Fall 2014 Lake 16
CS140M 3