Saturday Real Estate Seminar: Hosted by Century 21 Realty Alliance, 10-11 a.m., 1528 South El Camino Real, Room 110, San Mateo, free, reservation required, (650) 801-4718.

Bulletin, Real Estate, San Francisco Chronicle, 901 Mission St., San Francisco, CA. 94103, or fax to (415) 543-6956.

First-Time Home-Buyer Seminar: Sponsored by Whitney Davis of Zephyr Real Estate and Tina Leonardi of Guarantee Mortgage, 6-7:30 p.m., Opera Plaza, 601 Van Ness Ave., Suite P, San Francisco, free ...