Saheli's Madrasa
David McIlroy
Go to all the locations. Your back will be against a room number. Take the room number modulo the building number, and then convert from number to alphabet (1=A, etc.) This spells out SEMICONTOOLSISOWNEDBY; the answer being SETOHOLDINGS.
The rooms are as follows:
24-619 - S 10-225 - E 36-121 - M 11-273 - I 4-167 - C 35-225 - O 24-206 - N 50-220 - T 16-223 - O 38-547 - O 16-188 - L 37-611 - S 13-5014 - I 66-547 - S 56-351 - O 26-335 - W 54-1526 - N 6-215 - E 5-229 - D 9-155 - B 38-177 - Y