74LS02, - NOR
74LS06 -buff
74LS07 - buff
74LS74 - D-FF
74LS121 - c-c output
74LS240 - buff
74LS244 - buff
74LS393 - 4 state bin counter
74LS573 - 8bit Latch
80c196ks,
CD4532c, - 8bt encoder
NE555,- Ti, M/V
SN75173, - Quad Diff Line receiver
SN75174 - Quad Diff Line Driver
