Please note that this is a company listing not a brand listing, for brands see: Brands & trademarks. Companies are only listed in more than one country if they have officially moved. Only manufacturers and trading companies are listed here, pure service only companies are not indexed. This index is basically not the idea of the author of these pages since I do not find it useful in any way and in fact seriously misleading at times, OSRAM for instance has more infrastructure, personnel and manufacturing capacity in the USA than it has in Germany, still, it is classified as a German company since that is where its headquarters are. However a number of people have asked for this sort of an index so I relented in the end, to be brutally honest, all of those that asked for a country index came from the USA, read into that what you may.
(D) behind a name means that is either defunct or no longer in the AV/MI business, (N) means that the brand is still owned but not actively used. (MI) behind a name means it is primarily a musical instrument brand while a (LT) means that it is primarily a lighting and theatrical products label, and (PA) that it is a manufacturer of professional audio products. (CE) or no marking on the other hand indicates that they are consumer electronics brands (hi-fi, portable audio/video and home theatre in other words). Note that companies that straddle across market sectors may not get all of those sectors correctly marked but only the main ones.
Service companies are usually not listed here unless they are distinct brands visible on equipment or software, in that case they get the (S) behind their name, (LC) are licensed technology brands, (C) are computer and networking products (E) are pure educational products (musical instrument educational products are classified as (MI) rather than (E) though). Holding companies and other similar structures are denoted by (HF).