In ancient Rome, ‘collegium’ means a club or community, where some people live together and follow the same rules. Nowadays, college refers to a unit set up by one or a couple related fields in university. The concept that each college is responsible for a different subject can be traced back to Al-Azhar University. This historical Islamic school first established separated colleges for every subject!
.college is suitable for all universities to create their own websites! Such as ‘veterinary.college’,or ‘medicine.college’.