None. The Harvard Mark 1 ASCC (IBM Automatic Sequence Controlled Calculator) was an electromechanical computer built for Harvard by IBM's Endicott NY facility in 1944. It was constructed from 765,000 components which included switches, relays, motors, rotating shafts, and clutches. It contained no vacuum tubes.
The Harvard Mark III ADEC (Aiken Dahlgren Electronic Calculator) was the first computer to use vacuum tubes. It was built at Harvard in 1949 using 5000 vacuum tubes and 1500 crystal diodes, along with electromechanical components. The Harvard Mark IV, built in 1952, was the first fully electronic design.
Harvard University
Either Zuse Z3 or Harvard Mark I.
Harvard Mark I
1942, both the special purpose electronic digital Atanasoff Berry Computer at Iowa State University in Ames, Iowa and the general purpose electromechanical programmable digital Harvard Mark i computer at Harvard University in Cambridge, Massachusetts were finished and were first used.
Grace Hopper invented the Mark 1 computer and she invented the other series of the mark computers also.Wrong! Grace Hopper had nothing to do with design of the Harvard Mark I as she wasn't even there. Her first contact with it was several months after it was fully operating, when she was hired as its 3rd programmer.Howard Aiken designed the Harvard Mark I and IBM built it for him using Navy funds.Hopper did suggest and help design some upgrades to the Harvard Mark I and was influential on other Harvard Mark machines, but she invented none of them.Hopper did invent many software development methodologies on machines ranging from the Harvard Mark I to the UNIVAC I, including several compilers culminating in FLOW-MATIC, which was the major input used in defining COBOL.Note that there were several computers identified as Marl 1, not just the Harvard machine. A few examples are:Ferranti Mark 1, in Manchester England the first British commercial computerManchester Mark 1, the prototype for the Ferranti Mark 1ETL Mark 1, in Japan
The Harvard Mark IV had about 4000 tubes.
Harvard University
Psychology and Computer Science
Harvard Mark I
Mark Zuckerberg studied Computer Science and Psychology at Harvard University
Mark Zuckerberg's major at Harvard was actually Psychology though he loved programming and ended up taking a lot of computer science courses. If you think about it, it makes perfect sense how he mapped people relationships to computer science with something like Facebook.
IBM's first computer was the IBM ASCC at Harvard University (later renamed the Harvard Mark I due to an argument between IBM and Howard Hathaway Aiken of Harvard) in 1944.IBM's first electronic computer was the IBM 701 in 1952.
Either Zuse Z3 or Harvard Mark I.
Harvard Mark I was created in 1944.
The term Mark I Computer is ambiguous as there were many given this name built in different places by different people. However as almost all of these computers were first generation machines (using vacuum tubes) built before 1960, it is probably safe to say the Mark I Computer was before the Apple Newton.
In 1946two Americans, Presper Eckert, and John Mauchly built the ENIAC electronic computer which used vacuum tubes instead of the mechanical switches of the Mark I. The ENIAC used thousands of vacuum tubes, which took up a lot of space and gave off a great deal of heat just like light bulbs do. The ENIAC led to other vacuum tube type computers like the EDVAC (Electronic Discrete Variable Automatic Computer) and the UNIVAC I (UNIVersal Automatic Computer).
Harvard Mark I