Roland

A brief background about Roland -

Roland Corporation is a Japanese manufacturer of electronic musical instruments, electronic equipment, and software.  (Wikipedia)

Roland was founded in April 1972.  There are factories in China, Japan, and the United States.

(A full history of the Roland brand can be found on Wikipedia.)

Roland brand products -
Synthesizers, Digital Pianos, Electronic Drums, DJ gear, Guitar Synthesizers, Amplifiers, Recording

Roland sub-brands

Boss - For guitar players (Pedals, Effects Units, Amplifiers, Portable Recording Equipment, etc.)

Cakewalk - Music Software*
*As of 2013, Cakewalk is now a division of Gibson.

Roland Systems Group - Professional commercial audio and video

Rodgers - High-quality electric, electronic, and pipe organs

Amdek and Roland DG are too complex for me to write here.

And there you have it - a brief background about Roland.