The "Tiny7" name specifically refers to a build that is:
Boots with as little as 88-128 MB (though 512 MB is recommended) What's Included? i tiny7 iso full
Removes Windows Media Center, tablet PC features, and many language files (keeping only essentials). The "Tiny7" name specifically refers to a build
Functionality is typically left intact for security patches. tablet PC features
Many drivers, help files, and backup components (like winsxs ) are purged to save space.