A 56.5 KB PDF from the Catalyst 24WC series, naming the 24WC32 and 24WC64, which are 32 Kbit and 64 Kbit two-wire serial EEPROMs; the schematic label aside, this is a datasheet. Inside one expects the pinout, address pin usage, write protection, page size and timing data. It helps distinguish these parts from the similarly numbered 24WC33 and 24WC65, set the right programmer profile, and check pull-ups and supply on the board. Dump the chip first so the original contents can be restored.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.