Cornell can be a confusing place, and we don't make it easier by abbreviating everything and not calling things by their actual name. This can be especially confusing for first year students. Hopefully by using this nifty guide you can walk onto campus with confidence (and not mix up the Olin's and Uris').
1. A&S: Arts and Sciences, college
2. AnSci: Animal Science, major
3. Archies: Students of the school of Architecture
4. BRBs: Big Red Bucks, Cornell’s digital currency
5. CALS: College of Agriculture and Life Sciences
6. CS: Computer Science, major
7. CTB: Collegetown Bagels, best cafe in Ithaca
8. CTP: Collegetown Pizza, best place for drunk pizza
9. CU: Cornell University
10. EA: Early Acceptance
11. Eco: Ecology House, program house
12. ED: Early Decision
13. FWS: Freshman Writing Seminar, class
14. HBHS: Human Biology, Health and Society, major
15. Hotelies: Students of the School of Hotel Administration
16. HumEc: Human Ecology, college
17. IC: Ithaca College
18. IFC: Interfraternity Council, Greek life organization
19. ILR: Industrial Labor Relations, college
20. JAM: Just About Music, program house
21. LGR: Let’s Go Red!
22. Libe: Cafe in Olin library
23. LLC: Latino Living Center, program house
24. Nasties: Bear Necessities, located in RPCC
25. O-Week: Orientation Week for Freshmen
26. Oaks: Oakenshields, dining hall in Willard Straight Hall
27. Olin Hall: Building for Engineering students
28. Olin Library: Library open to all students, contains Libe cafe
29. PAM: Policy Analysis and Management, major
30. Panhel: Panhellenic, organization for sororities
31. PMA: Performing and Media Arts
32. POST: Pre-Orientation Service Trips, program for incoming students
33. Prelims: What Cornell calls tests (Why???)
34. PSB: Physical Sciences Building
35. PSP: Prefreshman Summer Program
36. RPCC: Robert Purcell Community Center, central hub of North Campus containing a dining hall, store, and many other services
37. RNSP: Residential and New Student Programs, people who run residential life
38. Stacks: A place in libraries where it’s only shelves of books where students go to complete #1 of 161 Things to do at Cornell
39. Townies: Residents of the town of Ithaca
40. Trill: Short for Trillium, the best cafe on campus
41. Uris Hall: Ugliest academic building on campus
42. Uris Library: Library opposite Olin library, open 24/7
43. WSH: Willard Straight Hall, the other student center, located on Ho Plaza
Hope this helps! LGR!