Social Science Section 3 Flashcards
William’s tube based memory was replaced by
core memory
How many locations used the SABRE system?
54
Travel agents used what to input information into the SABRE?
keyboard terminals
What system gave the world the first interactive computing>
SABRE
What is time sharing?
Multiple keyboard terminals could be connected to central computer
What company was the primary forces in the reduction in computer costs
Digital Equipment Corporation
How large was the PDP
size of a small refridgerator
Who developed a timesharing system called CTSS?
Fernando Corbato
What does SAGE stand for?
Semi-Automated Ground Environment (air defense system)
By what year were all major airlines using interactive computerized systems?
1970s
What company used experience gained to create a system for the airlines?
IBM
How was the first version of UNIX written
It was written in assembly language
What did Thompson and Ritchie do to improve UNIX for the PDP-11?
Ritchie wrote a new programming language called C
How is C language best described compared to FORTRAN and COBOL?
C is much more minimalistic
How did AT&T become involved with UNIX?
They sold copies of UNIX to universities at a lower cost
Why couldn’t AT&T commercialize UNIX
They were a government-controlled monopoly that wasn’t allowed to enter into any venture not related to Telephony
Why were universities able to improve UNIX source code?
AT&T had a “flexible license” that allowed it.
What was the main reason that UNIX entered the workforce?
University students were well trained in UNIX, and wanted to keep working with it after university
Who began modern networking?
J. C. R. Licklider
What did Licklider do before networking?
He was the IPTO at ARPA
Why did Licklider want to network computers together?
He hoped that researchers would be able to use the computers more economically
What id the key difference between the ARPANET and earlier time sharing services?
The various computers in the ARPANET could be from different vendors and operating systems.
What is another name for the IPM?
Node
Define the function of an IPM
The IPM served as an intermediary between the host (the computer in the ARPANET) computer and the rest of the network.