Even more precisely, it was published in the first edition of "Računari u vašoj kući" magazine. That magazine was created as a special edition of Galaksija maga

Even more precisely, it was published in the first edition of "Računari u vašoj kući" magazine. That magazine was created as a special edition of Galaksija magazine (so name came from there, that part was right), but from that point on we had both Galaksija, for general science, and Računari for computers.