The Polytechnic Museum began to collect calculating devices and computing machines in the first years of its formation in the 1860s.. Today, the Museum has the Fund Collection “Electronic Digital Computing Machines”, which consists from seven systematic collections and eleven personal funds of Russian scientists. There are about three hundred objects and over sixteen hundred documentary, printed, and graphical items today. All four generations of electronic digital computing machines are presented in the museum. In addition, the museum created eleven personal funds of Russian scientists who devoted their activity to computer science. The museum has opened these funds, which include collections from S. Lebedev, I. Bruk, B. Rameev, V. Glushkov and others. It is very important to point out that this fund collection is the only one of such variety and size in Russia.