The Bureau of Electronic Publishing, one of the largest distributors of com-mercial CD-ROM titles (more than 250) has released a list of its best sellers for the first quarter of 1990. They are: Grolier's Electronic Encyclopedia, PC-SIG Library, Microsoft Bookshelf, Ziff's Com-puter Library, Oxford English Dictionary, Microsoft Programmer's Library, McGraw- Hill's Science and Technical Reference Set, Adle's Shareware Grab-Bag, Geovision, and Between Heaven and Hell.