sentences:  Beginning in 1986, most of the operating system work on Concurrent DOS 386 and XM, Multiuser DOS, DR DOS and PalmDOS was done in Digital Research's European Development Centre (EDC) in Hungerford, Berkshire.Later on some work was also done by Digital Research GmbH in Munich, Germany.As requested by several OEMs, Digital Research started a plan to develop a new DOS operating system addressing the shortcomings left by MS-DOS in 1987.