EXIF
Windows 7 supports IPTC in JPEG Picture Files! (Not quite – Adobe XMP actually)
Update 2018-04-22: Reformatted after move from WordPress to Hugo. Wow! I’ve just discovered by accident that Windows 7 beta supports a few IPTC XMP attributes in picture files. At last, Microsoft supporting standards! Above is a screen shot from the properties of a test picture. The Description and Origin sections seem to be standard IPTC fields and I checked them out using iTag. In iTag the Title attribute comes out as both the Title and the Description.