ABCD 3.1 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The program lies within Education Tools, more precisely Science Tools. The most popular versions of the program are 3.1, 1.0 and 0.8.
The latest version of the program can be downloaded for PCs running Windows Vista/7/8/10/11, 32-bit. Commonly, this program's installer has the following filenames: Abcd.exe, htskapp.exe, ImageProcess.exe, TaoDeThiTracNghiem.exe and WinAppLocalDb.exe etc. We recommend checking the downloaded files with any free antivirus. The actual developer of the free software is Daniel Cote.
From the developer:
ABCD Gaussian Beam Propagation Software allows you to propagate laser beams through standard optical elements (free space, dielectric, thin lens, curved mirror, gaussian duct and dielectric interface). It can be used as a research tool for people working in optics labs and might be useful as a teaching aid for an undergraduate-level entry course in modern optics.
You may want to check out more software, such as LASCAD or MICR E13B Match font, which might be similar to ABCD.