Analog computers

alt=Planispheric Astrolabe made of brass, cast, with fretwork rete and surface engraving|thumb|upright=1.2|North African, planispheric astrolabe. Khalili Collections|Khalili Collection. thumb|upright|A modern astrolabe made in 2013, in Tabriz, Iran.

ancient analog computer designed to calculate astronomical positions

mechanical analog computer

machine for calculating dynamic behavior by analog electronics or mechanic analogies

system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal; device converting a physical quantity to a digital number

electronic device that converts a digital signal into an analog signal (mixed signal device), mostly realized as part of an integrated circuit (IC)

thumb|A typical parallel-scale nomogram. This example calculates the value of T when S = 7.30 and R = 1.17 are substituted into the equation. The isopleth crosses the scale for T at just under 4.65.

thumb|right|upright=1.3|Philips' Planisphere, ca. 1900

combination of analog and digital computer

mechanical analogue computer designed to solve differential equations by integration

thumb|The front of a metal E6-B

thumb|Equatorium from Johannes Schöner

fluidic analogue computer simulating the UK ecomomy

early analog computer based on hydraulics

thumb|A 15th century volvella of the moon upright|thumb|A sixteenth-century wheel chart, a page of Astronomicum Caesareum by [[Petrus Apianus, 1540, apparently relating to the Moon. The red dragons mark out one odd-sized and 26 equal-sized central divisions; the orbital period of the moon is 27.3 days.]] upright|thumb|A volvelle from the sixteenth century edition of the De sphaera mundi by [[Johannes de Sacrobosco.]]

thumb|The FERMIAC, or Monte Carlo trolley, was an analog device invented by [[Enrico Fermi to implement studies of neutron transport.]]

automatic tracking microwave radar

piece of naval technology

form of circular slide rule used in aviation and one of a very few analog computers in widespread use in the 21st century

AKAT-1 is a historic analog computer.

Serbian roboticist (1919-2001)

thumb|Room view - Deltar analogue computer at the DIV of Rijkswaterstaat in 1984 thumb|The Deltar (27 January 1972) thumb|Layout of the Deltar.1. Analog river sections2. Peripheral equipment (Punched tape)3. Operator controls4. Measuring controls5. Analog output (recorders)6. Digital output (punched tape)7. Design table (configuration of river setup)8. Wind generator. thumb|The connection table of the Deltar for the construction of river configurations

mechanical analog computer, constructed and set up to predict the ebb and flow of sea tides and the irregular variations in their heights – which change in mixtures of rhythms, that never (in the aggregate) repeat themselves exactly

large numeric or alphanumeric display used to convey information