A rich vein of city records from Sept. 11, including more than 12,000 pages of oral histories rendered in the voices of 503 firefighters, paramedics, and emergency medical technicians, will be made public today.

The histories - a mosaic of vision and memory recalling the human struggle against surging fire, confusion, and horror - were compiled by the New York City Fire Department beginning in October 2001, but to this date, no one from the department has read them all or used them for any official purpose.

The city has announced that it will also release today a written log of calls to the 911 system, many from trapped office workers, as well as tapes of fire dispatchers. Other records, including tapes of 911 operators, are being assembled and are not yet ready for release, city officials said.