- Alex McKenzie
- Personal
-
Autobiographical Anecdotes
>
- Breakfast - 1940s & 50s
- Those Were the Days - 1950s
- Building Underwater Gear, 1950's
- Can't Let Go - 1953
- The Turning Point, 1957
- Mexico, October 1965
- Bilbo Baggins 1971
- A brush with death? 1977
- What I didn't do, 1979
- Brazil 1996
- Family Dinner Time
- Forbidden Fruit
- Solo Sailing Incident, ca 2000
- Joel Nichols - 2013
- Manatees, January 2014
- Motorcycle Incident, June 2014
- Time is a Thief, 2015
- Never Too Old to Learn, 2015
- Two Weeks in Rockport MA 2015
- A Fork in the Road - 2016
- The Winos
- Smooth Stones
- Change
- No One Would Have Guessed ... - 2017
- What I Discovered ...
- At This Time of Year ... 2017
-
AMC Trail Crew
>
-
The Trail Crew in Appalachia
>
- With the Trail Gang
- Recovery of the Old Bridle Path on Mt. Lafayette
- The Trail Spree of 1929
- Webster Cliff Trail 1912-1914
- Trail Bridges
- The Story of the Mahoosuc
- 1939 trail report
- June 1940 trail report
- Dec 1940 trail report
- 1941 trail plan
- A Vacation With Pay
- 25 Years of the AMC Trail Crew
- Five Thousand Trail Signs
- The AMC Trail System
- The Pace of the Grub-Hoe
- 1953 trails report
- 1954 trails report
- trail report - call for volunteers
- Trail Erosion
- Ethan Pond Shelter
- An Early AMC Trail Crew
- Great Gulf Shelter
- The AMC Trail Crew 1919-1964
- The Evolution of a Trailman
- Trail Crew Thoughts
- Trail Design. Construction & Maintenance
- Of Mules, Mice, and Madison
- The Green Plate Special
- 1980-81 trails report
- Trail Blazers
- White Mountain Trail Crew - 75 Years
- 1960 Trail Crew Resignation
-
The Trail Crew in Appalachia
>
- 2017 Summer Trip
-
Autobiographical Anecdotes
>
- Professional
- INWG Documents
- Family
-
Alexander A. McKenzie II
>
- Mount Washington >
-
LORAN
>
- Crusing the Labrador
- Acquisition of Canadian sites for Long-Range-Navigation Stations
- Sites #1 and #2: Loran Memo #108
- LRN Site No. 3
- Report of Construction at L.R.N. Site #3, 8/10-11/5 1942
- LRN Site No. 4 (Bonavista Point, Newfoundland)
- Supplies for Site 4
- Drawings Left at Site #4 by A.A. McKenzie
- Site 4 Letter of March 24, 1943
- LRN Site No. 5
- LRN Site No. 8
- LRN Site No. 9
- Test Plan - Eastern US
- LORAN - Part 1
- LORAN - Part 2
- LORAN - Part 3
- End of LORAN
- Genealogy >
-
Alexander A. McKenzie II
>
- Photos
-
Europe 2015 -first half
>
- Barcelona April 2015
- Pont du Gard France - April 24, 2015
- Nimes France - April 27, 2015
- Aix-en Provence - April 28, 2015
- Cote d'Azur - April 29, 2015
- Vence to Gourdon - April 30, 2015
- Eze France - May 1, 2015
- Milano - May 3, 2015
- Parco Burchina - May 6, 2015
- Ivrea & Aosta Valley - May 7, 2015
- Torino - May 9, 2015
- Europe 2015 - second half >
- Indianapolis Art Museum - July 2015
- Ringling Estate
- Oak Park 2017
- Frank Lloyd Wright in Florida
-
Europe 2015 -first half
>
- Edit Website
I received a BS (Mathematics) from Stevens Institute of Technology in 1962, and an MS (Computer Science) from Stanford University in 1963.
During 1964-1967 I worked at Honeywell Computer Systems Division as an assembly language programmer, mostly working on Fortran compilers.
In 1967 I joined the staff of Bolt Beranek and Newman Inc. (BBN) and for three years I was involved with the documentation and design of time-sharing systems and laboratory automation.
In 1969 BBN received a contract from the Advanced Reseach Projects Agency (ARPA) to build a new type of data communication system based on the concept of packet switching. The first 4 switches (called Interface Message Processors or IMPs) of this system (called ARPANET) were delivered by the end of 1969. I did not participate in this stage of ARPANET. I joined the ARPANET project in November 1970. By that time ARPANET consisted of about a dozen switches and was growing at the rate of about one a month. The computers which the network was designed to service (called Hosts) were beginning to be physically connected to the network, and the Host organizations were beginning to wrestle with the design of operating system extensions and protocol which would allow the Hosts to understand each other. This work was being carried out by the Network Working Group (NWG) and my job was to serve as the representative of the IMP group to the NWG.
In the NWG I participated in the design of the first round of Host-level protocols. Although most of the good ideas came from other members of the group, I was frequently in the position of synthesizing the various ideas and writing the protocol descriptions. I was also involved in taking NWG requests for IMP program changes to BBN, and for conveying IMP hardware and software details to the NWG. Thus I was involved in almost all aspects of ARPANET growth and development beginning in late 1970.
As the primary IMP group interface to the ARPANET's user community, I realized that although the ARPANET was funded as an advanced research project, and both ARPA and BBN expected continuous research and development, the Host communities expected the ARPANET to be as stable as the telephone or power utilities if they were to make practical use of it. After a lot of internal argument within BBNabout whether these views could be reconciled, I was appointed to manage the BBN Network Control Center and try to balance the needs of network developers and the Host community. Gradually my management responsibilities increased until by 1986 I was responsible for a business unit of BBN Systems and Technologies, a position in which I supervised departments involved in internet consulting, engineering, and operations; networked applications; and information security in networked environments, with a total of about 250 employees and 1994 sales of over $50 million. I held this position for the next 8 years.
In October of 1972, with packet switched networks being built or planned in several countries, the network community began thinking about the need for interconnecting these networks in the near future. I was one of the people who formed an International Network Working Group (INWG) to consider these issues.
INWG quickly became the International Federation for Information Processing Working Group 6.1 (IFIP WG6.1-Architecture and Protocols for Computer Networks). I was an active member from 1972 through 1979, served as Chairman from 1979 through 1982, and as Secretary from 1982 through 1994. I was
awarded the IFIP "Silver Core" for outstanding service in 1986.
From 1970 until my retirement from BBN in 1996, my professional life was focused on the growth of packet-switched technology from the ARPANET to the Internet.
During 1964-1967 I worked at Honeywell Computer Systems Division as an assembly language programmer, mostly working on Fortran compilers.
In 1967 I joined the staff of Bolt Beranek and Newman Inc. (BBN) and for three years I was involved with the documentation and design of time-sharing systems and laboratory automation.
In 1969 BBN received a contract from the Advanced Reseach Projects Agency (ARPA) to build a new type of data communication system based on the concept of packet switching. The first 4 switches (called Interface Message Processors or IMPs) of this system (called ARPANET) were delivered by the end of 1969. I did not participate in this stage of ARPANET. I joined the ARPANET project in November 1970. By that time ARPANET consisted of about a dozen switches and was growing at the rate of about one a month. The computers which the network was designed to service (called Hosts) were beginning to be physically connected to the network, and the Host organizations were beginning to wrestle with the design of operating system extensions and protocol which would allow the Hosts to understand each other. This work was being carried out by the Network Working Group (NWG) and my job was to serve as the representative of the IMP group to the NWG.
In the NWG I participated in the design of the first round of Host-level protocols. Although most of the good ideas came from other members of the group, I was frequently in the position of synthesizing the various ideas and writing the protocol descriptions. I was also involved in taking NWG requests for IMP program changes to BBN, and for conveying IMP hardware and software details to the NWG. Thus I was involved in almost all aspects of ARPANET growth and development beginning in late 1970.
As the primary IMP group interface to the ARPANET's user community, I realized that although the ARPANET was funded as an advanced research project, and both ARPA and BBN expected continuous research and development, the Host communities expected the ARPANET to be as stable as the telephone or power utilities if they were to make practical use of it. After a lot of internal argument within BBNabout whether these views could be reconciled, I was appointed to manage the BBN Network Control Center and try to balance the needs of network developers and the Host community. Gradually my management responsibilities increased until by 1986 I was responsible for a business unit of BBN Systems and Technologies, a position in which I supervised departments involved in internet consulting, engineering, and operations; networked applications; and information security in networked environments, with a total of about 250 employees and 1994 sales of over $50 million. I held this position for the next 8 years.
In October of 1972, with packet switched networks being built or planned in several countries, the network community began thinking about the need for interconnecting these networks in the near future. I was one of the people who formed an International Network Working Group (INWG) to consider these issues.
INWG quickly became the International Federation for Information Processing Working Group 6.1 (IFIP WG6.1-Architecture and Protocols for Computer Networks). I was an active member from 1972 through 1979, served as Chairman from 1979 through 1982, and as Secretary from 1982 through 1994. I was
awarded the IFIP "Silver Core" for outstanding service in 1986.
From 1970 until my retirement from BBN in 1996, my professional life was focused on the growth of packet-switched technology from the ARPANET to the Internet.