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GTAman said:Do you mean the first?
zevon8 said:short bit of interesting 1964 Fairchild history:
http://smithsonianchips.si.edu/augarten/p16.htm
the first linear op-amp, the uA702 ( still available apparently )
same dates as mentioned in the above link, from the Tony Van Roon Guelph University page
Tony's page is very good, worth a look around by the way, lots of info and circuits.