Editing Telephone directory (section)

===CD ROM===
''Selectphone'' (ProCD) Inc.)<ref name=OnlyFive/> and ''PhoneDisc'' (Digital Directory Assistance Inc) were among the earliest such products. These were not a matter of a single click: PhoneDisc, depending on the mix of Residential, Business or both, involved up to eight CD-ROMs.<ref name=KatzNYT97/> ''SelectPhone'' is fewer CD-ROMs: five.<ref name=OnlyFive>{{cite news |newspaper=[[The New York Times]]
|url=https://www.nytimes.com/1994/12/13/science/cd-rom-review-disks-for-mac-voyager-still-leads.html
   |title=CD-ROM Review; Disks for Mac: Voyager Still Leads
   |author=Peter H. Lewis |date=December 13, 1994 |access-date=September 20, 2022}}</ref>

Both provide a reverse lookup feature (by phone number or by address), albeit involving up to five CD-ROMs.<ref name=Pdisc94/><ref name=OnlyFive/>