computers 1 [vynechat] dejiny 1 [vynechat] dejiny matematiky 1 [vynechat] dejiny objavov a vynálezov 1 [vynechat] history of discoveries and inventions 1 [vynechat] history of mathematics 1 [vynechat] matematika 1 [vynechat] počítače 1 [vynechat] radio engineering 1 [vynechat] rádiotechnika 1 [vynechat] television 1 [vynechat] televízia 1 [vynechat]