Thomson is a French High tech corporation who produce Weapons, Electronnic devices and used to produce home computers in the 80's.
Yet those machines were litteraly whipped out by Amstrad in the French market.
Despite this they were quite common because in the 80's, the french governement started a programme "informatique pour tous" (computering for all) which consisted of equipping schools with computers networks.
As a result, a lot of Thomson computers were sold to schools.