Browse Items (7891 total)
Sort by:
Testing core memory
This appears to be a photo of technicians testing a core memory module with a Digital Equipment Corporation memory tester.
Memory Test Computer 1516
Publicity photo of the Memory Test Systems 1516 core memory tester (built from DEC system modules.) A memory test computer was used to test the ferrite core memory modules in early general computers such as Whirlwind.
Early Digital Laboratory Modules
Circa 1960, Digital Equipment Corporation's (DEC) first products were a range of packaged logic circuit known as Digital Laboratory Modules. Built with discrete transistors the modules performed basic logic functions (e.g., clocks, pulse generators,…
PDP-4 Computer
The PDP-4 was 18-bit machine intended to be a slower, cheaper alternative to the PDP-1; it was not considered commercially successful. All later 18-bit PDP machines (7, 9 and 15) were based on a similar, but enlarged instruction set, more powerful,…
Publicity photo of PDP-5 computer
DEC's first 12-bit computer which introduced the instruction set that would later be expanded in the PDP-8. The PDP-5 had a memory capacity of 1,024 to 32,768 12-bit words (roughly 2KB-64KB). It was the first computer line in the industry with more…
Publicity photograph of the Spark Chamber Scanning System 2319
Used in physics laboratories the Spark Chamber Scanning System used television cameras to record the location of cosmic ray events within the spark chamber. This information was recorded on tape and then fed into an IBM computer for further…
Ink Blotter
Frank J. McCarron, Ins. Agent
An ink blotter promoting Saint Paul Fire and Marine Insurance Company, local agent Frank J. McCarron.
United Cooperative Society Share of Capital Stock
One share of stock issued to Owen J. Hill in 1956 for the sum of $5.00.
Edison Life
The Great Hurricane of September 21, 1938
The bi-monthly magazine published by the Boston Edison Company for its employees. This issue is entirely devoted to the 1938 hurricane.
All American Club Halloween? Party
This photo is from one of the early Halloween parties of the All American Club.
In 1945, when the Finnish boys and girls who had grown up in Maynard came back from World War II, they wanted to form a Finnish American club at the Parker Street Hall…
In 1945, when the Finnish boys and girls who had grown up in Maynard came back from World War II, they wanted to form a Finnish American club at the Parker Street Hall…
Capital Stock
United Co-operative Society of Maynard
A certificate issued to Stanley Slabyz for four shares of capital stock.
M. E. Church, Maynard, Mass.
Postcard mail to Oscar Tower, Weymouth, Mass from Maynard, Mass. Postmarked at 2 PM on September 20, 1906 in Maynard and received same day in Weymouth at 6 PM. Hmmm.
Assabet Mills--General View
Maynard, Mass
Postcard, in Finnish, sent from Annie Hnikan(?), Sudbury Rd., Concord to Mary Anderson, Maynard in 1920.
Jeannette Cherry Adams
A sepia photo of Jeannette Cherry Adams, mother of Mary (Adams) Maynard, and wife of James Adams.
