| Abbr. used for brevity | 22 |
| Abbr. used by name-droppers? | 28 |
| Abbr. used by electrical engineers | 34 |
| Abbr. unlikely to start of a sentence | 37 |
| Abbr. under an address | 22 |
| Abbr. to the right of a star | 28 |
| Abbr. to the left of a number | 29 |
| Abbr. that usually refers to people | 35 |
| Abbr. that starts with a different letter than its word | 55 |
| Abbr. that shortens text | 24 |
| Abbr. that saves time and space | 31 |
| Abbr. that saves space | 22 |
| Abbr. that prompts "24/M/Texas," e.g. | 47 |
| Abbr. that often precedes a colon | 33 |
| Abbr. that obviates itemizing | 29 |
| Abbr. that might appear above "e-mail" | 48 |
| Abbr. that may precede an ellipsis | 34 |
| Abbr. that may precede a colon | 30 |
| Abbr. that may make you look up | 31 |
| Abbr. that may denote worthlessness | 35 |
| Abbr. that may cause sticker shock | 34 |
| Abbr. that follows a year | 25 |
| Abbr. that denotes "U.S. president" | 45 |
| Abbr. that can replace a lot of things | 38 |
| Abbr. that can follow master or staff | 37 |
| Abbr. that a proof reader might come across? | 44 |
| Abbr. starting some corp. names | 31 |
| Abbr. stamped on an invoice | 27 |
| Abbr. stamped on a food label | 29 |
| Abbr. stamped on a bad check | 28 |
| Abbr. spotted in the mailroom | 29 |
| Abbr. sometimes written twice in a row | 38 |
| Abbr. sometimes used twice in succession | 40 |
| Abbr. sometimes used twice in a row | 35 |
| Abbr. sometimes seen twice in a row | 35 |
| Abbr. sometimes before a date | 29 |
| Abbr. signaling that the subject line contains the full content of an e-mail | 76 |
| Abbr. seen near GBP and EUR | 27 |
| Abbr. seen in repeat citations | 30 |
| Abbr. seen in Bartlett's | 28 |
| Abbr. seen before a year | 24 |
| Abbr. retired after Gorbachev's resignation | 47 |
| Abbr. reserved for kings and queens | 35 |
| Abbr. represented by a red circle | 33 |
| Abbr. referring to a previous citation | 38 |
| Abbr. re ergs, etc. | 19 |
| Abbr. re a bounced check | 24 |
| Abbr. rarely seen at the start of a sentence | 44 |
| Abbr. preceding multiple surnames | 33 |
| Abbr. preceding a date | 22 |
| Abbr. preceding 10 digits | 25 |
| Abbr. pertaining to origin | 26 |
| Abbr. pertaining to liability | 29 |
| Abbr. part, often | 17 |
| Abbr. paired with zero | 22 |
| Abbr. over an airport screen | 28 |
| Abbr. on wanted posters | 23 |
| Abbr. on W.W. II maps | 21 |
| Abbr. on Topps cards | 20 |
| Abbr. on top of some e-mails | 28 |
| Abbr. on toothpaste boxes | 25 |
| Abbr. on the bottom of a business letter | 40 |
| Abbr. on the back of a title page | 33 |
| Abbr. on the back of a stereo receiver | 38 |
| Abbr. on Sydney-bound mail | 26 |
| Abbr. on some statements | 24 |
| Abbr. on some shingles | 22 |
| Abbr. on some sheet music | 25 |
| Abbr. on some sale tags | 23 |
| Abbr. on some marked-down clothes | 33 |
| Abbr. on some mail | 18 |
| Abbr. on some magazine sections | 31 |
| Abbr. on some license plates | 28 |
| Abbr. on some letter headings | 29 |
| Abbr. on some iron | 18 |
| Abbr. on some invoices | 22 |
| Abbr. on some invitations | 25 |
| Abbr. on some hulls | 19 |
| Abbr. on some dials | 19 |
| Abbr. on some cornerstones | 26 |
| Abbr. on some clothing tags | 27 |
| Abbr. on some city limit signs | 30 |
| Abbr. on some cheques | 21 |
| Abbr. on some beef | 18 |
| Abbr. on signs at mountain lookouts | 35 |
| Abbr. on sheet music for folk songs | 35 |
| Abbr. on seconds | 16 |
| Abbr. on sale items | 19 |
| Abbr. on sale garment tags | 26 |
| Abbr. on Rockies skeds | 22 |
| Abbr. on Perry Mason's card | 31 |
| Abbr. on pen-pal envelopes | 26 |
| Abbr. on outdated maps | 22 |
| Abbr. on older phones | 21 |
| Abbr. on old U.S. maps | 22 |
| Abbr. on old TVs | 16 |
| Abbr. on old maps | 17 |
| Abbr. on old food labels | 24 |
| Abbr. on old Eurasian maps | 26 |
| Abbr. on old Asian maps | 23 |