This is the screen font from the IBM 5100 Portable Computer. It is uppercase-only, and has a large repertory of APL-related characters as well. Of note is that no two adjacent horizontal dots are ever both active, because the font seems to have also been intended to be used with a dot-matrix printer.
This is a rendition of one of A. V. Hershey's dot fonts from his 1967 paper "Calligraphy for Computers", the "Mathematical" (serif) font. This version is really a hybrid of the original "Mathematical" and "Cartography" fonts, having some symbols such as the circle drawing and map symbols that the "Mathematical" font originally lacked.
This is a rendition of one of A. V. Hershey's dot fonts from his 1967 paper "Calligraphy for Computers", the "Cartographic" (sans-serif) font, plus a number of glyphs imported from the "Mathematical" font, as well as many additional glyphs drawn in the same/similar style to the original glyphs. This font actually dates to at least as early as June 1963, as it is featured on some diagrams in Hershey's "The Plotting of Maps on a CRT Printer" paper.
Published: 14th September, 2008
Last edited: 14th July, 2015
Created: 31st August, 2008
v0.99. A font inspired by the VFD glyphs used by Texas Instruments and several other manufacturers.
Note: The center segments being off-center is an artifact usually associated with slanted VFD glyphs, not straight ones.