Arm rests for use with computers; Audio speaker enclosures; Automatic altitude indicators; Backpacks especially adapted for holding laptops and notebook computers; Bathroom scales; Batteries and battery chargers; Calculators and calculating machines; Cases for music, audio and related electronic equipment, namely, cases for audio tuners, audio receivers, amplifiers, tape players, compact disc players, MP3 controllers/players, audio mixers, audio speakers in the nature of music studio monitors...