Crab pulsar would not have been detected by systematic surveys until
after 1982!
B1937+21 (P=1.6ms) discovered 1982 [2]
For large areas: data rate greater than hardware limits at the time.
LMXBs proposed as MSP progenitors
LMXB excess in globular clusters
Globular cluster targeted searches ( 
msps)
In 1991 only 4 Galactic msps known
Large area searches become feasible
In 1996 now 35 Galactic msps known
Most found at Parkes and Arecibo