244:. Later that year in September 15–19 of 75, Cerf and Hendricks were the only two delegates from the United States, to attend a workshop on Data Communications at the International Institute for Applied Systems Analysis, 2361 Laxenburg Austria where again, Hendricks spoke publicly about his innovative design which paved the way to the Internet as we know it today.
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In the late 1970s, VNET was much larger than the ARPAnet/Internet as measured in the number of computers connected. In 1981, when the ARPAnet began converting to TCP/IP, there were about 250 ARPAnet nodes and 1000 VNET nodes. Hendricks and others had proposed the interconnection of the two networks.
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In 1971, Norman
Rasmussen, founder and manager of IBM’s Cambridge Scientific Center, asked Hendricks to find a way for the CSC machine to communicate with machines at IBM’s other Scientific Centers. Hendricks and Tim Hartmann, of the IBM Technology Data Center in Poughkeepsie, NY, produced RSCS,
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computer. Hendricks wrote his own game, also named “Spacewar!,” which was the first computer video game to run on an IBM Computer. For several years, MIT used
Hendricks version of “Spacewar!” at their Annual Open House, making it possibly the first video game ever to be seen (and played) by the
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Hendricks left the CSC in July 1977, joining the IBM San Jose
Research Laboratory. In 1983, unable to convince IBM management to support his networking ideas for joining VNET and TCP/IP, he left IBM and worked as an independent consultant for several years. He then joined the
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and which directly influenced both
Internet development and user acceptance of networking between independently managed organizations. Within IBM, the resulting network later became known as VNET and grew to 4000 nodes. In the academic community, VNET formed the base for
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which went into operation within IBM in 1973. RSCS was later renamed and released to IBM customers as the VM/370 Networking PRPQ in 1975. The importance of this subsystem as a component of VM is described by
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Lynn
Wheeler, formerly of the IBM Cambridge Scientific Center, maintains an online archive of contemporaneous documents. These numbers, which changed rapidly, are stored at
255:, then at IBM, thought the VNET/ARPAnet linkup would be "absolutely wonderful -- with no downside except security risks, which were containable." IBM management declined.
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221:(SNA) as its official communications strategy. SNA was incompatible with VNET and with many of the networking ideas being developed for what would be called the
202:. A key problem with this new software architecture was finding a way to expand the functions of the system without significantly increasing the size of the
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A PRPQ (Programming
Request for Price Quotation) was an IBM administrative term for software that was available but not fully supported as an IBM product.
206:(control program). Hendricks developed the concept of a service virtual machine, implemented in a simple communications system named CPREMOTE.
129:. He attended Herman Avenue Elementary School, Washington Heights Elementary School (both in Lemoyne, Pennsylvania, Lemoyne Middle School, and
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which extended to 500 organizations and 3,000 nodes. VNET was also the networking design underpinning EARN in Europe, and NETNORTH in Canada.
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As an undergraduate, Hendricks visited the MIT student employment center, where he was offered the position of computer operator, running an
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In 1977, Hendricks received an IBM "Outstanding
Achievement Award," for the "VM/370 Networking PRPQ," and the IBM internal network.
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video display to the 360/65, Hendricks looked for a project to learn how to program it. Upstairs in the same building,
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in June, 1967 with a bachelor's degree in
Electrical Engineering. He began graduate studies with networking pioneer
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At IBM, Hendricks worked with the team that had developed the world’s first virtual machine operating systems,
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It's Cool To Be Clever, The story of Edson C. Hendricks, the genius who invented the design for the
Internet
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RSCS was sold as a product by IBM until May, 2008, when it was repackaged as an optional feature with the
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229:. Hendricks and others lobbied vigorously within IBM for a change in direction, but were rebuffed.
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model 65 computer. Hendricks was rapidly promoted to systems programmer. When IBM added a
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Despite this formal name, the network was almost universally referred to as VNET
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100:(May 22, 1945 - August 29, 2020), an IBM computer scientist, developed
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Hendricks died on August 29, 2020, in
Cardiff-by-the-Sea, California.
431:; Hartmann, T.C. (1979). "Evolution of a Virtual Machine Subsystem".
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Corporation, and later became one of the very earliest employees at
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in Carlsbad, California. He now lives in San Diego, California.
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had created “Spacewar!,” the first computer game, using a
407:"VM and the VM community, past present, and future"
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515:MIT School of Architecture and Planning alumni
368:"The origin of the VM/370 time-sharing system"
217:Meanwhile, in the fall of 1974, IBM announced
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480:"IBM's missed opportunity with the Internet"
152:(CSC), he joined their staff in March 1968.
530:People from Cumberland County, Pennsylvania
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375:IBM Journal of Research & Development
325:http://www.garlic.com/~lynn/2006k.html#8
460:. Victoria, BC: Agio Publishing House.
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133:in Camp Hill, Pennsylvania, all in the
125:Hendricks was born on May 22, 1945, in
139:Massachusetts Institute of Technology
71:Massachusetts Institute of Technology
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347:http://www.vm.ibm.com/related/rscs/
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232:In June 1975, MIT Professor
219:Systems Network Architecture
414:SHARE 89 Sessions 9059-9061
150:Cambridge Scientific Center
16:American computer scientist
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135:West Shore School District
345:IBM product announcement
236:accompanied Hendricks to
171:Technological innovations
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405:Varian, Melinda (1997).
137:. He graduated from the
131:Cedar Cliff High School
478:(September 23, 1999).
456:Jones, Leanne (2011).
327:verified on 2011-09-19
540:VM (operating system)
485:San Jose Mercury News
349:, verified 2011-09-21
251:Turing Award winner
127:Lemoyne, Pennsylvania
59:Lemoyne, Pennsylvania
225:, particularly with
492:on November 6, 2012
449:10.1147/sj.181.0111
433:IBM Systems Journal
391:10.1147/rd.255.0483
366:(September 1981).
262:operating system.
143:J. C. R. Licklider
98:Edson C. Hendricks
42:Edson C. Hendricks
467:978-1-897435-63-2
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525:1945 births
385:: 483–490.
242:Vinton Cerf
509:Categories
357:References
204:hypervisor
48:1945-05-22
419:March 15,
287:Hendricks
121:Biography
253:Jim Gray
223:Internet
158:Linkabit
110:Internet
443:: 122.
336:Gillmor
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314:Creasy
278:Varian
227:TCP/IP
200:CP/CMS
162:ViaSat
115:BITNET
84:Fields
61:, U.S.
439:(1).
410:(PDF)
381:(5).
371:(PDF)
266:Notes
238:DARPA
192:PDP-1
498:2011
462:ISBN
421:2021
398:2011
260:z/VM
181:2250
106:VNET
102:RSCS
38:Born
445:doi
441:IBM
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383:IBM
189:DEC
147:IBM
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
