| URL ender for the ASPCA | 23 |
| URL ender for a charity | 23 |
| URL completer | 13 |
| UNESCO URL ender | 16 |
| U.S.O., for one: Abbr. | 22 |
| U.R.L. ending that's not "com" or "gov" | 63 |
| The O.A.S. is one | 17 |
| The "O" in P.L.O.: Abbr. | 34 |
| The "O" in NATO (Abbr.) | 33 |
| The 'O' of WHO: Abbr. | 29 |
| The 'O' of NATO Abbr.: | 30 |
| slashdot.___ | 12 |
| PLO part | 8 |
| Part of WHO: Abbr. | 18 |
| Part of UNESCO's address | 28 |
| Part of PLO: Abbr. | 18 |
| Part of OPEC (abbr.) | 20 |
| Part of many URLs | 17 |
| Part of many U.R.L.'s | 25 |
| Part of ILO: Abbr. | 18 |
| Part of I.R.O.: Abbr. | 21 |
| Part of a WWW address, sometimes | 32 |
| Part of a WWW address | 21 |
| Part of a non-profit's address | 34 |
| P.T.A. or B.S.A. | 16 |
| ORT is one | 10 |
| Organization, abbr. | 19 |
| OPEC is one: Abbr. | 18 |
| One of the original top-level domain name endings | 49 |
| OAS segment | 11 |
| NPR. follower | 13 |
| Nonprofit's URL ender | 25 |
| Nonprofit URL ending | 20 |
| Non-profit's URL ender | 26 |
| Non-profit URL ending | 21 |
| Member of the WHO? | 18 |
| Likely Internet domain name suffix for a 501(c)(3) | 50 |
| Kind of chem. | 13 |
| Kin of assn. | 12 |
| It follows a dot in many on-line addresses | 42 |
| Follower of dot | 15 |
| Ending of UNICEF's Web site | 31 |
| Ending of many Web site names | 29 |
| Ending for a non-profit | 23 |
| End of the Red Cross' URL | 29 |
| End of the Red Cross' address | 33 |
| Edu cousin | 10 |
| Domain name suffix for a nonprofit | 34 |
| Domain name suffix | 18 |
| Cousin of com | 13 |
| Company URL ending | 18 |
| Common web-address extension | 28 |
| Common dot follower | 19 |
| Common domain name extension for nonprofits | 43 |
| Charity's URL ender, maybe | 30 |
| Certain domain name ending | 26 |
| Brief association? | 18 |
| Assn. kin | 9 |
| Alternative to gov | 18 |
| Alternative to com, edu or net | 30 |
| Alternative to .net | 19 |
| Alternative to .com, .net, or .edu | 34 |
| Alternative to .com or .net | 27 |
| Alternative to .com or .edu | 27 |
| Alternative to .com | 19 |
| AA or AAA | 9 |
| Church instrument | 17 |
| Heart, for one | 14 |
| Liver, but not onions | 21 |
| Harmonium | 9 |
| Bach's instrument | 21 |
| Cathedral instrument | 20 |
| Church music maker | 18 |
| Instrument with pedals | 22 |
| Choir accompaniment | 19 |
| Spleen, e.g. | 12 |
| Kind of transplant | 18 |
| Instrument played by Bach | 25 |
| Heart, e.g. | 11 |
| Bach instrument | 15 |
| The Phantom's instrument | 28 |
| Stadium entertainer | 19 |
| Radio City Music Hall fixture | 29 |
| Mass instrument, often | 22 |
| Liver, e.g. | 11 |
| It plays in church | 18 |
| Hymn accompaniment | 18 |
| Heart, but not soul | 19 |
| Heart or liver | 14 |
| Generous donation | 17 |
| E. Power Biggs' instrument | 30 |
| Dupré's instrument | 25 |
| Church keys? | 12 |
| Church keyboard | 15 |
| Cathedral fixture | 17 |
| Ballpark instrument | 19 |
| Bach music maker | 16 |
| You'll hear it at the ballpark | 34 |
| Word with ''pipe'' or ''mouth'' | 63 |
| Posthumous donation | 19 |