Can anyone out there shed some light on this/these title(s)?  Was there a
title change and if so, when?

In 1991, January I think, Avionics added the word Magazine onto the cover.

Avionics (OCLC #6908947) had ISSN 0273-7639.  In July of 2001, the ISSN
changed to 1085-9284.  But I can't seem to pinpoint when the title change
occurred, or even if one occurred.

Ulrich's online lists Avionics as current, while OCLC record #33448517 says
Avionics Magazine superceded Avionics, but it doesn't state when this
occurred.

Phillips Business Information : Potomac, MD, Inc is the publisher
throughout.

Does a new ISSN constitute a title change?

Thanks in advance for any help!

Peter Washkevich
Embry-Riddle Aeronautical University
Daytona Beach, FL
peter.washkevich@erau.edu