Sophos is one of the largest anti-virus vendors in the world, and the largest in Europe. Sophos's increasingly rapid growth internationally is reflected in a user base of well over five million and revenues which soared by more than 70% in the year 1999-2000. Sophos Anti-Virus, the company's flagship product is sold and supported in over 120 countries through a global network of subsidiaries and partners.

Central Command, Inc. an American owned and operated corporation, consults, designs, and markets Advanced Virus Protection software, as well as, electronic security products, and is one of the leading anti virus companies in the United States and Canada.

Procmail can be used to create mail-servers, mailing lists, sort your incoming mail into separate folders/files (real convenient when subscribing to one or more mailing lists or for prioritising your mail), preprocess your mail, start any programs upon mail arrival (e.g. to generate different chimes on your workstation for different types of mail) or selectively forward certain incoming mail automatically to someone.

Leprechaun Software develops anti-virus software and is dedicated to computer security. Our commitment to technical excellence and devotion to our users has seen our leading product VirusBUSTER used on over 500, 000 computers.

NH&A is a small company based in New York City that specializes in anti-virus, security, and network management software sales and support. NH&A is a leading agent for most major anti-virus companies including McAfee, FPROT Professional, Antiviral Toolkit Pro, Dr. Solomon, TBAV, Sophos, Symantec, NetPro and IBM (pending) and InVircible (pending) and security software including ViaCrypt PGP.