John Eaton Elementary School in Cleveland Park is planning an open house to celebrate recently completed renovations to the school's century-old buildings. The celebration committee would like to invite every Eaton grad to the festivities, but it has no way to locate one and all. If you're an Eaton grad, please send your name, address and the years you attended the school to Carol Risher, care of John Eaton, 34th and Lowell streets NW, Washington, D.C., 20008.

If your pet has ever gotten sick or injured in the middle of the night, and you haven't known what to do because the vet is closed, help is here. An Animal Injury Hotline was started a few months ago by Mike Handley, a free-lance radio announcer (and full-time animal lover) who lives in Centreville. If you call 234-1900, Mike's dulcet tones will tell you where to call to find help at any hour.

Anyone know any Comos, besides Perry? A Connecticut genealogist is asking Washingtonians for help in locating descendants of a man named Edward F. Como. The genealogist, Charles Munat, says Como moved to Washington from Middletown, Conn., in 1902, when he was about 32. He was employed by the post office here until at least 1916. His wife's name was Annie Till Como. Their only known child was a daughter, stillborn in 1894. If you can help, please write to Munat at 38 Preston Ave., Middletown, Conn., 06457.