Construction Abbreviations and Acronyms

1. R
   Railroad
2. R
   Right
3. R
   Return
4. R
   Reverse
5. R
   Red
6. m2
   Square Metre
7. N2
   Nitrogen
8. O2
   Oxygen
9. R8
   Right
10. w3
    World Wide Web
11. ALT
    Altitude
12. ALT
    Alternate
13. ALT
    Alteration
14. ASY
    Royal Australian Air Force
15. MAP
    Manufacturing Automation Protocol
16. MAX
    Maximum
17. NAT
    Natural
18. PAX
    Passenger
19. PAX
    Private Automatic Exchange
20. CAL
    Calorie

Last updated: May 2, 2025 — Total entries: 8,284