A form that documents the accessibility features of a vendor's product.
A Voluntary Product Accessibility Template is a table containing information regarding how a product or service conforms with accessibility guidelines like Web Content Accessibility Guidelines (WCAG) 2.0 so it is usable by, people with limited capacities to see, hear, or exercise muscular control (aka disabilities). Although originally intended as a tool to facilitate government market research on ICT with accessible features, the VPAT has come to be viewed by the wider procurement community as a conformance report.
The rows of a VPAT table address different aspects of ICT products. The rows are grouped into sections addressing, for example, whether a mouse or keyboard are required to control the software; when images or colors are needed to understand the software; when text alternatives to images are available; and so forth.
Source: More about VPAT on Wikipedia