Workstations are located in various rooms, among those BA2200, BA2210, BA2220, BA2240, BA3175, BA3185, BA3195, BA3200. Typical workstation names are
squidxx.teach.cs.toronto.edu where xx is 01 to 12
b2200-xx.teach.cs.toronto.edu where xx is 01 to 18
b2210-xx.teach.cs.toronto.edu where xx is 01 to 28
b2220-xx.teach.cs.toronto.edu where xx is 01 to 24
b2240-xx.teach.cs.toronto.edu where xx is 01 to 14
b3175-xx.teach.cs.toronto.edu where xx is 01 to 24
b3185-xx.teach.cs.toronto.edu where xx is 01 to 24
b3195-xx.teach.cs.toronto.edu where xx is 01 to 24

You need the IP addresses, to run MPI processes.

Regarding unformity, it is a good idea to use similar type workstations.
1. Systems in 3185 3195 2200 2240: about 100 systems with E-2236 CPUs (3.4GHz, 6 cores) and 32GiB memory.
Note: room 3175 is being renovated and will work soon.
2. Systems in 2210 2220 3200: about 60 systems with i5-6500 CPUs (3.2 GHz, 4 cores) and 8GiB of memory.