Bob Armstrong
Sole Proprietor at CoSy
Woodland Park, Colorado, United States
Summary
👤
Senior🎓
Top SchoolBob Armstrong is a seasoned sole proprietor and software developer with nine years of formal experience building niche language-driven systems, notably combining APL and FORTH to create a commercial, APL-informed CoSy "notecomputing" environment. Since 1980 he has led CoSy, applying deep expertise in language design to projects such as a planetary temperature model implemented in 4th.CoSy and other computational tools. His background blends rigorous academic training in psychophysics and experimental psychology (BS/MA/MS, Northwestern) with hands-on engineering, giving him a rare cross-disciplinary perspective on human-centered computing. Bob has also communicated technical and philosophical ideas to broader audiences through his "Logic of Liberty" column, reflecting an interest in liberty and systems thinking beyond code. Based in Woodland Park, Colorado, he maintains a long-running public vita and project hub at CoSy.com, underscoring a decades-long commitment to bespoke language and modeling work.
9 years of coding experience
highschool, physics, highschool, physics at Culver Military AcademyMaster's degree, Experimental Psychology, Master's degree, Experimental Psychology at Northwestern UniversityMaster's degrees, math psychophysics, Master's degrees, math psychophysics at Culver Academies , Northwestern U
Stackoverflow
1reputation
0reached
0answers
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Github Skills (10)
apl10
safari-extension10
firefox-addon10
chrome-extension10
k10
browser-extension10
userstyle9
ide9
x868
github8
Programming languages (3)
Github contributions (5)
CoSyBob/CoSy
Feb 2017 - Feb 2020
CoSy APL NoteComputing environment in open x86 Reva Forth
Contributions:158 commits, 17 PRs, 180 pushes in 3 years
x86forthaplkide
ForthHub/ForthFreak
Jul 2019 - Nov 2025
ForthFreak wiki
Contributions:1 comment in 6 years 4 months
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