REEVES INSTRUMENTS CORPORATION

215 East 91st Street
New York 28, New York

A subsidiary of Dynamics Corporation of America.

REAC 100 series

REAC 100 series "Compact Analog Computer"
Reeves Instrument Corporation
New York, New York
Introduced in 1948, the REAC series 100 was the first computer to make a patchboard commercially available. In the picture, the computer unit is the second relay rack from the left. Power supplies are housed in the relay rack on each end. Second from the right is the optional servo-mechanisms unit containing four 60 cps servos. And in front of the computer is the recording unit.

Computing Elements:	20 - amplifiers
	7 of the amplifiers are integrators (gains of 1,1,1,4,4,10,10)
	7 are summers (gains of 1,1,1,4,4,10,10)
	6 are inverters with three input terminals
	22 - attenuator pots
	4 - servomultipliers and resolvers

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REAC 400 series
In the upper left corner of the cabinet is two Diode
Electronic Multipliers units and their control panel. In
the upper right corner is four 400Hz servos. Above
and to the right of the patchbay are four panels
each containing 18 30K .1% potentiometers. On the
right side below the potentiometers is the Reac 400's
control panel.

REAC 400 series
Reeves Instrument Corporation
New York, New York
The outstanding feature of this computer is it's use of patchbay switching to control servos, convert amplifiers from summers to integrators, etc., is accomplished by relays controlled from the patchboard. Cabinets are made from units 77 inches high, 20 inches wide and 28 inches deep which are bolted together in group of three or four.

Technology:	Vacuum tubes
Operating range:	+/- 100 volts DC
Computing Elements:

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REAC 600 series
Reeves Instrument Corporation
New York, New York

Computing Elements:

300 - amplifiers

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