Section 3 Flashcards
IBM and American Airlines uses SAGE technology for flight reservations
1000 travel agents, 50 locations, 2 IBM 7090 CPUs
SABRE
Programs on punch cards
Program output printed on paper
Batch-oriented computing
Interaction between computer and operator in real time
Interactive computing
Air Force commissions Servomechanisms Lab at MIT to build a flight simulator.
Core memory system, cathode-ray tube display screen, printer.
Project Whirlwind
IBM uses this technology in two AN/FSQ-7 computers with cathode-ray tube consoles
Air defense system
SAGE
Multiple keyboard terminals can access a central computer at the same time.
Idea by John McCarthy, developed by Fernando Corbato
Timesharing
Uses are allocated part of the directory to store data.
Users cannot access others data.
Users type commands onto teletype keyboards.
Supports up to 30 users.
CTSS
Early development of:
- “escape” and “control” keys.
- text editors.
- email messaging.
CTSS
Dartmouth professors Kemeny and E. Kurtz sought to make computer programming more accessible because FORTRAN was very difficult.
BASIC programming language
Invented in 1964 by Kemeny and E. Kurtz.
- Interpreted language, not compiled
- The program runs one line at a time
- Quick feedback
- Teletype input and output
BASIC
Computer that was popular for timesharing programs.
General Electric 235
MIT invented this to replace CTSS. Delayed due to development
Multics
Slow, buggy, over-engineered.
Too complex – tried to do too much. Could only support up to 25 users, even with the GE 645.
Multics
Founded by MIT engineer Kenneth Olsen. Pioneered the PDP series here.
Digital Equipment Corporation (DEC)
Transistors and core memory.
Cost $125,000.
Did not offer apps, software, or marketing
PDP-1
Cost $18,000.
Size of a refrigerator (aka a minicomputer).
Repurposed in the original equipment manufacturer industry.
PDP-8
Over 170,00 units sold.
Used RSTS-11 timesharing system.
Used modified form of BASIC.
Support C and the Unix OS.
PDP-11
Invented the C programming language.
Ken Thompson, Dennis Ritchie
Minimalist design with both high and low-level access.
Could run on any computer with a C compiler.
Fast and powerful.
Unix OS
Commonly used in universities.
Students who learned this OS got jobs.
Infiltrated the business world.
Unix OS
Director of the Information Processing Techniques Office.
Developed the foundations of networking in 1963.
J.C.R Licklider
Proposed store and forward packet switching based on nineteenth-century telegram networks.
Leonard Kleinrock, Paul Baran, and Donald Davis
Expanded from 4-100 nodes. Popularized electronic mail. U.S government sponsored networking program.
ARPANET
Rules about connected computer systems.
Each host could connect to ARPANET directly.
TCP/IP
An agreement on how data is formatted, encoded and transmitted.
Protocol
Non-ARPANET universities founded this in 1980. Notable for email and newsgroups.
Usenet
Early form of social media/online forums
Newsgroups
Founded by CUNY with access to IBM mainframe.
Bitnet
Merger of BITNET and CS Net.
Larger and better-funded than ARPANET.
Commercialized in the 1990s.
NSFNET
The United States’ government’s Advanced Respearch Projects Agency network.
ARPANET
Developed in France during the 1970-1980s. Used a display screen and keyboard.
Minitel
Could search phone numbers, read news, order train tickets, check weather, and access to 1000+ online services.
Minitel
Invented the first wireless computer in Hawaii.
Norm Abramson
Packet-switching network transmitted via radio.
ALOHAnet
Market leader in copy machines. Patents expired in the 1970s. Company invested in developing computer technologies.
XEROX PARC