PEN was written and published between 1985 and 1996 by Gary Oppenheimer of Oppenheimer Software. Oppenheimer Software was an early and long time sales agent for MCI's public electronic mail service MCI Mail.

Periodic Electronic Newsletter
By Gary Oppenheimer
(PEN editions currently available: Oct 1985 - Nov. 1987, No. 1-15.)
Gary started PEN as a vehicle to to inform and educate his customers. Over an eleven year span of time Gary wrote on topics as mundane and diverse as the difference between the Basic and Advanced services (on MCI Mail), how to send and receive Telex messages via MCI Mail, EMS and X.400 addressing, and MCI Mail Global Access.
Keep in mind that PEN was written during the 1980s and early 1990s -- at a time when most people had never even heard of electronic mail!
On a side note, PEN is one of the first, if not the first, newsletter to be distributed via e-mail.
We hope you enjoy taking a trip back in time with the Periodic Electronic Newsletter.
A footnote:
PEN has been republished on the Scribd website. To access the PEN collection just click on the image above, or the hyperlink under the image.
