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possible Programming fonts

Programming font should be monospaced, not proportional

Readibilty test with 'Illegal1 = O0'

Visual font comparisons
Programming fonts
a monospacef font family
TOP 10 PROGRAMMING FONTS

Monospaced

Consolas
Courier New

Test these too:

DejaVu Sans Mono
Euphemia
Euphemia UCAS
Fira Code
Fixedsys
jdIcoMoonFree
LiberationMono
Lucida Console 10, "isn't so good because the bold text takes up more room than the non-bold text"
Lucida Sans Typewriter
Microsoft Uigur
OCR A Extended
OpenSymbol
Source Code Pro (and its versions)
Source Sans Pro

Non-monospaced (test them all)

Arial Rounded MT Bold 10px pretty nice! (in notepad++)
Gadugi
TW Cen MT
Verdana

Some suggestions:

6x13
Andale Mono
Anonymous
Anonymous Pro
Bitstream Vera Sans Mono
Deja Vu
Dina
Droid Sans Mono
Comic Sans Mono
Courier Prime
Cutive Mono
Envy Code R
Fantasque Sans Mono
Fira Mono
Fixedsys Excelsior
Gill Sans MT
Inconsolata 11/14pt
Input Mono
Input Mono Condensed
Lato
Liberation
Lucida Grande
Lucida Sans
Lucida Sans Unicode
Menlo
Mensch
Microsoft Sans Serif
Monaco, 12
MonteCarlo - "has a bold face too, so that editors using bold for syntax highlighting leave text properly fixed width"
MS Reference Sans Serif
Neep Alt, 13/17
Nirmala UI
Office Code Pro
OptiSmall
Orator Std
Prestige Elite Std
ProFont
ProFont »tweaked«, 9
Proggy Clean +
Proggy Tiny
PT Mono
Raize Font
Roboto Mono, 9
SamsungImagination Modern
Segoe UI
UW ttyp0
Vera mono
Vera Sans
Tahoma
Terminus
Triskweline
Trebuchet MS
Turbo Pascal
Pointfree