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.
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.