What are the meanings of most common abbreviations in Ingress?

Solution 1:

All the abbreviations follow simple rules taking into account the Rarity, Level and Name of an item or thing it represents.

Items

• R - Resonator

• X, XMP - Burster

• C, PC - Power Cube

• U, US - Ultrastrike

• MUFG - MUFG Capsule

• LPC - Lawson Power Cube

• Usage: 100XMP6 - 100 level 6 Bursters

Mods

3 Types of Rarity

• C - Common
• R - Rare
• VR - Very Rare

Mod types

• S - Shield, AXA - AXA Shield

• HS - Heat Sink

• MH - Multi-Hack

• LA - Link Amp

• FA - Force Amp

• T, TU - Turret

• UL, SB - SoftBank Ultra Link

• Usage: CMH / RMH / VRMH = Common / Rare / Very Rare Multi-Hack

Miscellaneous

• L4 - Level 4

• A8, AL8 - (Agent) access level 8

• P8 - Portal level 8

• F8 - Farm of level 8 portals (What is Farm?)

• LTP - Long Time/Term Portal (Guardian)

• ETA - Estimated Time of Arrival

• F2F - Face to Face

• HO - Hangout (G+ talk)

• Usage: "1A8 missing for F8" or "1R8 missing for F8"
  meaning that 1 Resonator lvl 8 is missing at a farm to make lvl 8 Portals.

• ENL - Enlightened

• RES - Resistance

• Usage: "Someone go destroy that ENL F8 in centrum."
  We had 20P8 with RMH, VRS and Turrets at fully linked F8.