Dialcom Inc. was a US corporation

Corporation

A corporation is created under the laws of a state as a separate legal entity that has privileges and liabilities that are distinct from those of its members. There are many different forms of corporations, most of which are used to conduct business. Early corporations were established by charter...

 which developed the world's first commercial electronic mail service. It was founded in 1970 by Robert F. Ryan and was sold to ITT Corporation

ITT Corporation

ITT Corporation is a global diversified manufacturing company based in the United States. ITT participates in global markets including water and fluids management, defense and security, and motion and flow control...

 in 1982, becoming ITT Dialcom.
Dialcom's e-mail software ran on Prime

Prime Computer

Prime Computer, Inc. was a Natick, Massachusetts-based producer of minicomputers from 1972 until 1992. The alternative spellings "PR1ME" and "PR1ME Computer" were used as brand names or logos by the company.-Founders:...

 minicomputer

Minicomputer

A minicomputer is a class of multi-user computers that lies in the middle range of the computing spectrum, in between the largest multi-user systems and the smallest single-user systems...

s and was licensed to governmental telecommunications providers in over seventeen countries. Various extra features could be offered by Dialcom-based services, including gateways to telex

Telex

Telex may refer to:* Telex , , a communications network** Teleprinter, the device used on the above network* Telex , a Belgian pop group...

 and fax

Fax

Fax , sometimes called telecopying, is the telephonic transmission of scanned printed material , normally to a telephone number connected to a printer or other output device...

, and online information retrieval services. In 1986, British Telecom, who used Dialcom software for its Telecom Gold

Telecom Gold

Telecom Gold was an early commercial electronic mail service launched by British Telecom in 1982. It was based on Prime minicomputers running Dialcom software...

service, bought Dialcom from ITT.

Dialcom systems

Each Dialcom system was allocated a two-digit identification number. This was used as a prefix for the Dialcom e-mail addresses (or "mailboxes"), thus allowing e-mail to be exchanged between difference Dialcom services. By 1990, the following Dialcom systems were operating:

Country	Service	Systems
	Minerva/Keylink	07, 08, 09
	Infotex	20-24
	Databoks	71
	Telebox	62
	Telebox	15, 16
	Dialcom	88, 89
	Eirmail	74
	Goldnet	05, 06
	Mastermail	65-68
	KDMINC	13, 14
	Dialcom	52
	Telecom Gold	75
	Telepro	52
	Memocom	27-29, 55
	Starnet	01, 02
	Dialcom	25
	Telebox	10-12
	Dialcom	52
	Telecom Gold	01, 04, 17, 80-89
	Dialcom	29-34, 37, 38, 41-59, 61-63, 90-99