Harvard Mark I relay-based computer

GPTKB entity

Predicate	Object
gptkbp:instanceOf	electromechanical computer
gptkbp:alsoKnownAs	gptkb:IBM_Automatic_Sequence_Controlled_Calculator
gptkbp:component	relays switches clutches rotating shafts
gptkbp:countryOfOrigin	gptkb:United_States
gptkbp:designer	gptkb:Howard_H._Aiken
gptkbp:fundedBy	gptkb:U.S._Navy
gptkbp:height	2.4 meters
https://www.w3.org/2000/01/rdf-schema#label	Harvard Mark I relay-based computer
gptkbp:input	punched tape
gptkbp:length	15.5 meters
gptkbp:location	gptkb:Harvard_University
gptkbp:manufacturer	gptkb:IBM
gptkbp:notableUser	gptkb:Grace_Hopper
gptkbp:numberOfRelays	over 3,000
gptkbp:numberOfSwitches	over 2,000
gptkbp:operationalPeriod	1944-1959
gptkbp:output	SD card typewriter
gptkbp:powerSource	electricity
gptkbp:speed	1 multiplication in 6 seconds 3 additions per second
gptkbp:successor	gptkb:Harvard_Mark_II
gptkbp:type	relay-based computer
gptkbp:usedDuring	gptkb:World_War_II
gptkbp:usedFor	mathematical calculations
gptkbp:weight	4.5 tons
gptkbp:yearCompleted	1944
gptkbp:bfsParent	gptkb:Harvard_Design_Model
gptkbp:bfsLayer	8