1960s Playing with radio, xtal sets, Tubed CB sets and converted car radios

1963   Novice: WN4APR with ARC-5 Command sets on 40/80m

1973  Playing with VHF FM in Japan and building radios

1975  Wrote first RTTY BBS, later added phone, then RF ASCII

1978   Worked with AMRAD group developing AX.25 in USA

1982 wrote first data map program plotting navy ship positions on APPLE2 in Japan.

1983, wrote VIC-20 VHF/HF BBS and Gateway and defined 200 Hz shift due to development of mods to dozens of surplus VADCG bell 103 modems with cross-county links to W0RPK, W9TD, and K7PYK on 10.149 MHz.  Remained on the air 5 years through 1989 under the FCC STA for automatic packet HF operations.  Developed larger system on the Commodore C-64 for BBS's used around the world through the 90's.

1984 Developed CETS (Connectionless Emergency Traffic System) on Vic-20 and C-64 for digital packet comms in support of 100 mile cross country endurence run for AMRAD.

1986 or so, used CETS for amateur packet radio support of the FEMA National Disaster Medical System exercises in DC area.

1988 or so, ported CETS over to the new IBM AT PC and began to add maps and position plotting of stations.

1990 or so. Began hand making maps of the USA for CETWS use.

1992 Changed name of CETS to APRS and presented paper at DCC in Teaneck NJ where I first met Sproul Brothers who later wrote Mac and WinAPRS.

1994 Developed MIM Module with N3MIM and Mic-E protocol.  Proposed WIDEn-N digipeating

1996 or so worked with TAPR to produce Mic-Encoder and Paccomm to indroduce callsign-substitution RELAY, WIDE, TRACE digipeating

1998 Worked with Kantronics to introduced WIDEn-N digipeating and Kenwood to introduce the TH-D7 APRS walkie Talkie

2000 Kenwood introduced the D700 APRS mobile radio

2001 Introduced APRS touch-tone, APRS reporting of IRLP and Echolink. Developed PCSAT-1.

2004 Began the New-N Paradigm to rid APRS of all old legacy digipeating algorithms and focuse on user education for one standard

2005 Began initiative to include operating Frequency in all packets.

2006 Developed PCSAT-2 to fly on outside of ISS

2007 Developed ANDE, RAFT and MARScom amateur satellites for deployment by Space Shuttle

2008 Yaesu introduced the VX-8R APRS walkie-Talkie.

2008 Introduced the Universal Ham Radio Text Messaging Initiative to tie together the two-dozen or more existing amateur radio text messaging capabilities.

See www.aprs.org