For information, call the Baltimore Area Convention and Visitors Association, (410) 659-7300.
* Aug. 1-Aug. 4 National Bar Association, Hyatt Regency. Contact: John Krump. Expected attendance: 2,000
* Aug. 5-12 American Institute of Aeronautics & Astronautics, Hyatt Regency. Contact: Julie Walker. Expected attendance: 500
* Aug. 9-14 American Pet Products Manufacturers Association, Convention Center. Contact: Jules Schwimmer, 511 Harwood Building, Scarsdale, N.Y. 10583. Expected attendance: 1,800