| 100% | ATTN | 4 | Abbr. often capitalized on envelopes |
| 52% | ATTN | 4 | Abbr. on an envelope |
| 51% | RFD | 3 | Abbr. on a Mayberry envelope |
| 51% | MME | 3 | Abbr. on a French envelope |
| 51% | MLLE | 4 | Abbr. on a French envelope |
| 51% | ATTN | 4 | Abbr. on a business envelope |
| 50% | SRTA | 4 | Abbr. on an envelope to Mexico |
| 50% | ATTN | 4 | Abbr. on a business envelope, perhaps |
| 50% | NYNY | 4 | Abbr. on a Manhattan-bound envelope |
| 50% | ATTN | 4 | Abbr. before a name on an envelope |
| 49% | ATTN | 4 | Routing abbr. on an envelope |
| 49% | ATTN | 4 | Letters on an envelope: Abbr. |
| 48% | ENC | 3 | Self-addressed stamped envelope, often: Abbr. |
| 48% | WED | 3 | Middle column on a calendar, often: Abbr. |
| 48% | ATTN | 4 | "This is for.." on an envelope: Abbr. |
| 48% | ATTN | 4 | "Heads up!" on a business envelope: Abbr. |
| 47% | RDS | 3 | Things often passed on: Abbr. |
| 46% | ETA | 3 | Stat that you'd check often on Yelp: Abbr. |
| 45% | PCS | 3 | They often run on Intel products: Abbr. |
| 45% | AKA | 3 | Abbr. often used on the list of "FBI Ten Most Wanted Fugitives" |
| 45% | SCI | 3 | Class with the periodic table on the wall, often: Abbr. |
| 45% | DNA | 3 | It's often used to determine paternity on "Maury": Abbr. |
| 45% | ADDR | 4 | What's written on an envelope to be mailed: Abbr. |
| 45% | ATTN | 4 | Letters before a person's name on an envelope: Abbr. |
| 45% | CPR | 3 | Technique often practiced on Resusci Anne mannequins: Abbr. |
| 42% | LICK | 4 | What people often do to a stamp before putting it on an envelope |
| 42% | USE | 3 | Capitalize on |
| 42% | USES | 4 | Capitalizes on |
| 42% | XXX | 3 | Capitalize on |
| 42% | PTA | 3 | Group that often meets on a school night: Abbr. |