page_title: ENIAC
section_title: Main ENIAC parts
hierarchical_section_title: ENIAC / Main ENIAC parts
caption_attribution_description: ENIAC computer on display at Fort Sill Museum, Lawton, Oklamoma, US
context_page_description: ENIAC was the first electronic general-purpose digital computer. It was Turing-complete, and able to solve "a large class of numerical problems" through reprogramming.
  Although ENIAC was designed and primarily used to calculate artillery firing tables for the United States Army's Ballistic Research Laboratory, its first program was a study of the feasibility of the thermonuclear weapon.
  ENIAC was completed in 1945 and first put to work for practical purposes on December 10, 1945.
  ENIAC was formally dedicated at the University of Pennsylvania on February 15, 1946 and was heralded as a "Giant Brain" by the press. It had a speed on the order of one thousand times faster than that of electro-mechanical machines; this computational power, coupled with general-purpose programmability, excited scientists and industrialists alike. The combination of speed and programmability allowed for thousands more calculations for problems, as ENIAC calculated a trajectory in 30 seconds that took a human 20 hours. The completed machine was announced to the public the evening of February 14, 1946 and formally dedicated the next day at the University of Pennsylvania, having cost almost $500,000.
context_section_description: The main parts were 40 panels and three portable function tables (named A, B, and C).  The layout of the panels was (clockwise, starting with the left wall):
  Left wall
  Initiating Unit
  Cycling Unit
  Master Programmer - panel 1 and 2
  Function Table 1 - panel 1 and 2
  Accumulator 1
  Accumulator 2
  Divider and Square Rooter
  Accumulator 3
  Accumulator 4
  Accumulator 5
  Accumulator 6
  Accumulator 7
  Accumulator 8
  Accumulator 9
  Back wall
  Accumulator 10
  High-speed Multiplier - panel 1, 2, and 3
  Accumulator 11
  Accumulator 12
  Accumulator 13
  Accumulator 14
  Right wall
  Accumulator 15
  Accumulator 16
  Accumulator 17
  Accumulator 18
  Function Table 2 - panel 1 and 2
  Function Table 3 - panel 1 and 2
  Accumulator 19
  Accumulator 20
  Constant Transmitter - panel 1, 2, and 3
  Printer - panel 1, 2, and 3
  An IBM card reader was attached to Constant Transmitter panel 3 and an IBM card punch was attached to Printer Panel 2.  The Portable Function Tables could be connected to Function Table 1, 2, and 3.
caption: The bottoms of three accumulators at Fort Sill, Oklahoma, US
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