LM4250 Integrated Circuit - CASE: DIP8 MAKE: National Semiconductor

BA728 Integrated Circuit Op-Amp - CASE: DIP8 MAKE: ROHM

LM358N Integrated Circuit Op-Amp - CASE: DIP8 MAKE: Fairchild Semiconductor

LM351 Integrated Circuit - CASE: DIP8 MAKE: National Semiconductor

MM74C908N Integrated Circuit - CASE: DIP8 MAKE: National Semiconductor

BA6220 Integrated Circuit - CASE: DIP8 MAKE: ROHM

U2531B Integrated Circuit - CASE: DIP8 MAKE: Vishay Semiconductor

MC44608P75 Integrated Circuit - CASE: DIP8 MAKE: ON Semiconductor