SI 110 - 1/19/07
computer architecture
abstraction layers
- BIOS
basic input output system
IBM patented
Compaq
came up with their own BIOS
IBM sued
PC clones
1982-83
caused price to drop
- operating system
sockets to hardware
hardware device drivers
operating environment
UNIX
developed by old AT&T
used to switch telephone circuits
communications built in
patched in communications layer
- applications
browser
email client
Kaaza
used to be able to only run one app at a time
multitasking
processes
- Middleware
Java
Sun
open standard
Microsoft created their own standard
XML-family
Web Services
.NET
Writely
- Distributed Processing Systems
grid systems
Beowolf cluster
server farms
IBM needed an operating system
Microsoft's DOS
prof
running OSX on a PC
server hasn't crashed in 5 months
studied engineers as a historian
engineer - what will work best
runs a music server at home
encoders, decoders
examples
SETI
distributed computing
protien folding
yon yonson
Decss
130 lines of code
illegal to de-cssify
standards
component vs monolithic systems
Apple could guarentee software and hardware works together
IBM's system was monolithic, but inside was component
proprietary vs open
DOS/Wintel and Apple
unix, linux, and open-source
the .doc problem
.docx
open standard vs closed standard
IEEE
wifi
Firewire
1394
some standards you have to pay to use
CSS
content scrambling system
random
Office 2007
faster
can get smaller
code-base
can't take code out because you don't know how it works
linux
open source
can download off the web
Ubuntu
|
| |