UNISYS is proud to claim that we
possess the world's longest unbroken series of computers which
started when ERA received government permission to market
a commercial version of the then 'classified' Atlas computer.
ERA had shipped the Atlas to the National Security Agency
predecessor's cryptography department in October of
1950. It was fully operational in December 1950 - the
world's first stored program computer in a
1100 series of computers began with the 1101, a number coined
by the Atlas installation engineer, Jack Hill, because it
was developed under Task 13 - 13 in binary is 1101. This
product line series has evolved to today's 2000 series of
UNISYS business computers. Ron Q. Smith described
this history in the attached slide series.
The two computer tree figures below show the four
decade relationship of this computer line. Information
about all of these computers is listed in a spread sheet file,
click here to read it.
The time relationships of the other
UNIVAC computers developed in Philadelphia are shown on these
trees as are the RCA and Varian computers which were
bought out by UNIVAC. The early time relationships of
the early defense industry computers which began with ERA are
Programming Card (U-1717).PDF, scanned by Keith Myhre at
the Lawshe Memorial Museum
3.0 Early Computer Customer Lists
Our initial customers for these computer lines have been captured in a
document by Ron Q. Smith, some of his
information came from George Gray.
The ending point of the first tree (above) and the starting point of the second tree (below) is the 1107
computer shown in this photo at the right. A discussion about the 1108, the multi-processor son of the 1107 is in
another attached document.
4.0 Computer Tree, 1962 - 1980
5. Repertoire Cards
Many people gave repertoire cards to the Legacy Committee. Keith Myhre scanned the cards before they
were donated to the Charles Babbage Institute. The
commercial computer cards are linked hereunder. There are copies of some of
these cards at the Lawshe Memorial Museum.
The bit-savers web site (http://bitsavers.informatik.uni-stuttgart.de/) has
over 32,000 documents. We've copied and linked the
documents associated with the computers in the two genealogy
charts above for technology
researchers ease of access. Note that the 1101, 1103, and
defense computer series documents are linked from the
various bit-length pages.