FTP Software

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FTP Software was a software company incorporated in 1986 by James van Bokkelen, John Romkey (co-author of the MIT PC/IP package), Nancy Connor, Roxanne van Bokkelen (née Ritchie), Dave Bridgham and several other founding shareholders. Their main product was PC/TCP, a full-featured, standards-compliant TCP/IP package for DOS.


The core open-source software was developed at MIT starting in 1982 as the PC/IP project, a project to make PCs into first-class citizens on TCP/IP networks. This project began as a Telnet implemented by Louis J. Konopelski[1] under the supervision of Jerome Saltzer. Later contributors to the PC/IP project included John Romkey, David Bridgham, David D. Clark, and Donald W. Gillies.

FTP Software was the first of many companies to name themselves after an Internet protocol. At the time the company was founded, the PC/IP software package was already being sold by Wollongong, 3Com and others, and so some of the inventors of PC/IP decided to exploit their own product. The original PC/IP package contained a specialized TCP used only by its Telnet client, written by David D. Clark. It also contained ping, fortune, time, and a TFTP protocol client. After Donald W. Gillies produced a full-function multi-connection TCP and compatible SMTP for his bachelor's thesis, a mail proxy,[2] it became possible to offer an FTP implementation - which requires 2 concurrent TCPs. This software, known as "ntcp" (new TCP) in the source tree, could support 7 connections on a 128KB IBM PC-XT, and could interoperate with 10 different operating systems.[3] The multi-connection TCP languished in the source tree for two years before the FTP founders chose to make it the core of FTP Software, setting the company apart from the other competitors in this space, which were not actively improving PC/IP and were not willing to implement the FTP protocol based upon "ntcp".


Initially PC/TCP's protocol stacks and network interface drivers were linked into individual application executables, as with PC/IP. By 1990 all PC/TCP applications shared a TSR kernel, which itself (initially) used built-in network interface drivers. By 1991, John Romkey's TSR PC/TCP Packet Driver specification had largely replaced the built-in drivers.[citation needed]

The company had a good run, with a valuation of over $1 billion at one point, but suffered greatly from both internal and external pressures. It had grown rapidly and repeatedly moved physically farther away from its roots at MIT. The founders, though technically adept, were inexperienced as managers. They suffered from in-fighting, epitomized in a public divorce between two of the founders. The company went public in 1994, and maintained profitable growth through 1995, as a dominant supplier of TCP stacks for x86-based machines. When Microsoft included a TCP stack at no extra cost in Windows 95 (as has become standard with all operating systems), FTP lost a significant revenue source. Due to management (which by that time was mostly non-founders) failing to adequately prepare for the transition into supplying network-using applications, FTP was not able meet Wall Street's expectations and its stock price declined sharply.[citation needed]

In May 1996 FTP software announced it was providing Microsoft with various technology for Internet Explorer 2.0 for Windows 3.1, including a PPP network, 16-bit email client, and other technology.[4]

In 1998, FTP was bought out by former rival NetManage. The deal was controversial, with some shareholders claiming it was not in their interest since the sale price was less than the amount in FTP's bank account.[5]

Comparison with other products

An extensive history of TCP on personal computers was published in 1998 by Steven Baker for Unix Review.[6] A version that corrects some factual mistakes and expands upon some topics is stored here [1].


  • InterDrive
  • OnNet
  • LanWatch
  • PC/TCP
  • SNMP Tools
  • WinSNMP

See also


  1. Louis J. Konopelski, "Implementing Internet Remote Login on a Personal Computer", bachelor's thesis, MIT, December 1982. Also available as MIT-LCS-TM-233
  2. Donald W. Gillies, "Improved network security with a trusted email relay", bachelor's thesis, MIT, June 1984
  3. Donald W. Gillies, personal communication to John Romkey, 1993
  4. http://findarticles.com/p/articles/mi_m0EIN/is_1996_May_1/ai_18237333 FTP Software to provide key technology for Microsoft's Internet Explorer Version 2.0 for Windows 3.1 Business Wire, May 1, 1996
  5. http://www.apocalypse.org/pub/ftp-alumni/archives/ftp-alumni.9806
  6. Baker, Steven, "Desktop TCP/IP at middle age, UNIX Review, February 1998