These are Analog to Digital Converters

Part - Description:
AD574KD   12-Bit A to D Converter Tri-State
AD565JD   12-Bit A to D Converter Tri-State
ADC0804LCN   8-Bit Analog to Digital Converter
ADC0838CIWM   8-Bit Serial I/O A/D Converters with Multiplexer Options
TC500ACOE   17 Bit Dual Slope Precision Analog Front End

These are factory new parts. They have never been installed and have not been recovered from manufactured electronic components.