The IAS machine was engineered by Julian Bigelow and was a binary computer with a memory of 1,024 words that was operational until 1958 and is now owned by the Smithsonian.
Julian Bigelow was hired as chief engineer in May 1946. The IAS machine was a binary computer with a 40-bit word, storing two 20-bit instructions in each word. The memory was 1,024 words (5.1 kilobytes). 19521958 The computer is in the collection of the Smithsonian National Museum of American History but is not currently on display. 
