I honestly don't know much about this board. Purchased at an estate sale. No clue honestly. Selling untested, as is for parts as I have no way of testing it.

Here's what chat gpt says it is:

Vintage Wang Laboratories Memory Expansion Board

Original memory expansion daughterboard removed from a vintage Wang computer system.

Features

Genuine Wang Laboratories PCB

CHIPS & Technologies P82C302 memory controller

Fully populated with removable DRAM memory modules

Full-length proprietary memory expansion board

Approximate manufacture date: 1989–1990

Gold edge connector

Condition

Untested.

Clean cosmetic condition with no obvious physical damage.

All memory modules shown are included.

Sold as-is for collectors, restoration, or vintage computer repair.

This board appears to be a proprietary Wang memory expansion board used in one of the company's 386-based business computers or servers. Because these systems are uncommon, replacement parts can be difficult to find.