What do the abbreviations for football positions mean?

Offense:

• OL (General for any Offensive Lineman)
• OG or G (Offensive Guard)
  • LG (Left Offensive Guard)
  • RG (Right Offensive Guard)
• C (Center)
• OT or T (Offensive Tackle)
  • LT (Left Offensive Tackle)
  • RT (Right Offensive Tackle)
• TE (Tight End)
• WR (Wide Receiver)
• QB (Quarterback)
• HB (Half-back)
• RB (Running-back)
• TB (Tail-back)
• FB (Full-back)

Defense:

• DL (General for any Defensive Lineman)
• DT (Defensive Tackle)
  • LDT (Left Defensive Tackle)
  • RDT (Right Defensive Tackle)
• DE (Defensive End)
  • LDE (Left Defensive End)
  • RDE (Right Defensive End)
• NG or NT (Noseguard, Nosetackle)
• DB (General for any Defensive back)
• CB (Cornerback)
  • LCB (Left Cornerback)
  • RCB (Right Cornerback)
• S (General for any Safety)
  • FS (Free Safety)
  • SS (Strong Safety)
• LB (General for any Linebacker)
  • OLB (Outside Linebacker)
  • ILB (Inside Linebacker on 3–4)
  • MLB or MIKE (Middle Linebacker)
  • SAM or SLB (Strong Linebacker)
  • WILL or WLB (Weakside Linebacker)
  • Edge (Hybrid of LB and DE)

Special Teams:

• KR (Kick Returner)
• PR (Punt Returner)
• P (Punter)
• K (Kicker)
• LS (Long snapper)
• H (Holder)