No description.

Discussing electrical engineering.

Anything about laser technology.

You locked your keys in *where*?

Scientific theories you won't find in journals.

Audio devices and materials of yesteryear.

High-end audio systems. (Moderated)

Professional audio recording and studio engineering.

Electronic audio circuits which use vacuum tubes.

Technical aspects of automobiles, et. al.

Military aircraft of the past, present and future.

General discussion for aviators.

All aspects of sailplanes and hang-gliders.

General discussion of bicycling.

Bicycle racing techniques, rules and results.

Cycling product design, construction, maintenance, etc.

All aspects of working with metal.

Digital cameras, scanners, printers, software, PhotoCD.

Antennas: theory, techniques and construction.

Vacuum tube-based amateur radio equipment.

All about production amateur radio hardware.

Amateur radio construction and experimentation.

Amateur radio practices, contests, events, rules, etc.

Amateur radio transmissions through space.

Amateur astronomy equipment, techniques, info, etc.

Life of the past (but no creation vs evolution!).

Elementary questions about electronics.

Electronic circuit design.

Test, lab, & industrial electronic products.

General discussions of the field of electronics.

Fixing electronic equipment.

Welding of materials for manufacture & repair.

Satellite navigation systems, especially GPS.

Natural languages, communication, etc.

Logic -- math, philosophy & computational aspects.

Mathematical discussions and pursuits.

Short-lived discussions on subjects in the sciences.

Physical laws, properties, etc.

The theory of relativity.

Current physics research. (Moderated)

Discussions about space policy.