Most buildings on campus are equipped with electronic access doors which you will need an iFOB to enter. This single device can be used as a "key" to access all authorized spaces that have electronic access control. Access privileges are assigned electronically, eliminating the need to issue and retrieve keys.
Links
[1] https://www.uoguelph.ca/eaccess/faq/i-do-not-qualify-id-card-how-do-i-get-access
[2] https://www.uoguelph.ca/eaccess/faq/how-much-does-ifob-cost
[3] https://www.uoguelph.ca/eaccess/faq/how-long-my-ifob-good
[4] https://www.uoguelph.ca/eaccess/faq/iclass-fob-stopped-working-what-do-i-do
[5] https://www.uoguelph.ca/eaccess/faq/what-do-i-do-if-my-fob-becomes-damaged-lost-or-stolen
[6] https://www.uoguelph.ca/eaccess/faq/i-no-longer-need-my-fob-what-do-i-do-it