The Univac System (Eckert-Mauchly Computer Corporation, 1948) [pdf]
Bendix G-15 General Purpose Digital Computer (Bendix Corporation, 1955) [pdf]
Heath Inexpensive Electronic Analog Computer Kit (Daystrom, 1956) [pdf]
Univac solid-state computer "...a major breakthrough for Business- America" (Remington Rand Univac, 1958) [pdf]
RCA 501 Electronic Data Processing System (RCA, 1958) [pdf]
Stantec Zebra Electronic Digital Computer (STC, 1958) [pdf]
General Electric Proudly Presents the New GE 150 Data Processing System for the Automation of Business Data Processing (General Electric, 1959) [pdf]
NCR CRAM: Card random access memory (NCR Corporation, 1960) [pdf]
Ferranti Argus Process-Control Computer System (Ferranti Limited, 1961) [pdf]
Pace 231R Analog Computer (Electronic Associates, 1961) [pdf]
Control Data 160-A Computer (Control Data Corporation, 1962) [pdf]
Some facts about the Control Data 6600 (Control Data Corporation, 1963) [pdf]
On April 7, 1964 the entire concept of computers changed. (IBM, 1964) [pdf]
I.C.T. 1900 Data Processing System (International Computers and Tabulators, 1964) [pdf]
TR-20, TR-48 Desk Top Analog Computers "...for the Ultimate in High-Speed, Low-Cost Problem Solving Capabilities" (Electronic Associates, Inc., 1964) [pdf]
HITAC 10: High Performance Mini Computer (Hitachi, Limited, 1969) [pdf]
The Quantimet 720 Image Analysing Computer (Metals Research Instrument Corporation, 1970) [pdf]
The All-New Computer for the New Computer Age VARIAN 73 (Varian Data Machines, 1972) [pdf]
HP 9600C RTE-C: A Core-Based Real-time Multiprogramming System for your Applications (Hewlett-Packard, 1973) [pdf]
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see more Brochures at the Computer History Museum [link]
more early computer ads [link]
information at The UVa Computer Museum [link]
more info at Obsolete Computer Museum [link]