Compact archive referring to the NE5558 / SA4558 family part numbering, most likely a datasheet for a 4558-type dual operational amplifier.

Duplicate copy of the MC14553B documentation archive, identical in size at 82.9 KB, so likely the same datasheet stored twice.

Datasheet package for the MC14553B, a CMOS three-digit BCD counter IC from the MC14000 logic family.

Compact 34.8 KB RAR archive named after the HEF4556B, a dual 1-of-4 decoder/demultiplexer from the 4000-series CMOS logic family.