Analysis of information sources in references of the Wikipedia article "Transylvania (video game)" in English language version.
I spoke to an exultant Mark Pelzarski, president of Penguin. "Transylvania on the Mac is now half our sales!" he said, citing over 15,000 copies sold in less than two months. Using Apple's then-current estimate of 70,000 Macs sold, that meant that over a fifth of all Macintosh owners had purchased the program.
