NPS? EXC? OPW? Signs with three-letter codes have been popping up on Ontario highways ahead of the Pan Am and Parapan Am Games.

Approximately 5,000 blue-and-orange signs are being posted on highways in the Greater Toronto and Hamilton Area to help direct spectators, athletes and officials to the venues.

The signs feature three-letter codes like EPS and PAP, all of which can be found on a map put together by the Pan Am organizers.

Here's a quick guide to decoding the signs:

ABL - Abilities Centre (55 Gordon St., Whitby)

AJX - President's Choice Ajax Ballpark (2001 Audley Rd. N., Ajax)

ANG - Angus Glen Golf Club (10080 Kennedy Rd., Markham)

CCE - Pan Am Cross-Country Centre (RR#1, Orangeville)

CEB - Centennial Park Pan Am BMX Centre (256 Centennial Park Rd., Toronto)

CEP - Caledon Pan Am Equestrian Park (200 Pine St., Caledon)

CTC - Canadian Tennis Centre (1 Shoreham Dr., Toronto)

EPS - Exhibition Stadium (170 Princes' Blvd., Toronto)

EXC - Exhibition Centre (100 Princes' Blvd., Toronto)

HAM - CIBC Hamilton Pan Am Soccer Stadium (75 Balsam Ave. N., Hamilton)

HEN - Royal Canadian Henley Rowing Course (57 Main St., St. Catharines)

HRD - Hardwood Mountain Bike Park (402 W. Old Barrie Rd., Oro Station)

MAR - Atos Markham Pan Am/Parapan Am Centre (16 Main St., Unionville-Markham)

MIS - Mississauga Sports Centre (550 Rose Cherry Pl., Mississauga)

MIV - Cisco Milton Pan Am/Parapan Am Velodrome (2015 Pan Am Blvd., Milton)

MRT - Milton Time Trial Course (2015 Pan Am Blvd., Milton)

MWW - Minden Wild Water Preserve (Bethel Road, Minden Hills)

OBX - Oshawa Sports Centre (99 Athol St. E., Oshawa)

OPW - Ontario Place West Channel (955 Lake Shore Blvd. W., Toronto)

PAC - CIBC Pan Am/Parapan Am Aquatics Centre and Field House (University of Toronto, Morningside Avenue and Military Trail, Toronto)

PAF - Pan Am/Parapan Am Fields (University of Toronto, Hoskin Avenue at Devonshire Place, Toronto)

PAP - CIBC Pan Am Park (200 Princes' Blvd., Toronto)

PBV - Chevrolet Beach Volleyball Centre (200 Princes' Blvd., Toronto)

PLB - Pan Am Bowling Centre (5555 Eglinton Ave. W., Toronto)

RCY - Sugar Beach (11 Dockside Dr., Toronto)

RYA - Ryerson Athletic Centre (50 Carlton St., Toronto)

TCO - Toronto Coliseum (100 Princes' Blvd., Toronto)

TTS - Pan Am Shooting Centre (5206 Side Rd. 5, Cookstown)

UTS - University of Toronto Scarborough Tennis Centre (131 Old Kingston Rd., Toronto)

VAR - Varsity Stadium (299 Bloor St. W., Toronto)

WFC - Welland Pan Am Flatwater Centre (16 Townline Tunnel Rd., Welland)

YOR - CIBC Pan Am/Parapan Am Athletics Stadium (York University, Ian MacDonald Boulevard and Ottawa Road, Toronto)