A series of seiyuu CD-ROMs containing voice samples, movies, and still images,
called Voice Collection (ボイスコレクション), came out in late 1994.
These CD-ROMs were a hybrid ISO 9660 and Macintosh format,
and it also has some tracks that can be heard on a normal CD player.
Hisakawa Aya, Tomizawa Michie, and Kouda Mariko
were the first three CD-ROMs that were released.
Then there were two CD-ROMs that came out every half year or so.
There were some nice colorful advertisements for the Voice Collection