$FG,2$Terry A. Davis$FG$ wrote all of TempleOS over a span of $FG,2$$TX,"15.0",D="DD_TEMPLEOS_AGE"$$FG$ years (full-time). ZealOS, written over a span of $FG,2$$TX,"2.6",D="DD_ZEALOS_AGE"$$FG$ years, is a fork of TempleOS. It can run on some bare metal 64-bit PC's from about 2007-2019 with no layering, libraries, tools, modules or anything from other sources. Otherwise, you run it in a virtual machine, like $FG,2$VMware$FG$, $FG,2$QEMU$FG$ or $FG,2$VirtualBox$FG$. It is independent and stands alone. 100% of the src code is including on all distro's, from the kernel to the compiler to the boot loaders! It is public domain, not GPL.
*) The heap algorithm, $LK,"::/Kernel/Memory/MAllocFree.ZC"$, is adapted from one Terry saw at Ticketmaster when he worked on their VAX operating system.
*) The mountain in some games is from $FG,4$$TX,"http://www.public-domain-photos.com",HTML="http://www.public-domain-photos.com"$$FG$. The wolf in BlackDiamond is also from there. Terry took watermarked photos and converted to 16 color.
*) A few features were inspired by $FG,2$MATLAB$FG$, such as $FG,2$ans$FG$ in expressions at the command-line. There is a lot of $FG,2$MSDOS$FG$ , $FG,2$Windows$FG$, $FG,2$VAXTMOS$FG$ (VAX Ticketmaster O.S.) and $FG,2$Unix$FG$ inspiration, too, such as drive letters, command names, etc.
*) Thanks to whoever wrote this $FG,4$$TX,"CppHtml.ZC",HTML="http://web.archive.org/web/20100325153025/http://home.scarlet.be/zoetrope/cpphtml.htm"$$FG$. Terry was a novice on web stuff and you helped him with html. See $LK,"::/Demo/ToHtmlToTXTDemo/ToHtml.ZC"$.
*) Terry used the $FG,4$$TX,"ISO9660",HTML="http://users.telenet.be/it3.consultants.bvba/handouts/ISO9960.html"$$FG$ spec to help him understand the ISO9660 file system format.
*) Terry got $FG,4$$TX,"Webster's Dictionary",HTML="http://www.templeos.org/files/DICTIONARY.DD"$$FG$ and $LK,"The King James Bible",A="FI:::/Misc/Bible.TXT"$ from $FG,4$$TX,"Project Gutenberg",HTML="http://web.archive.org/web/20110730111436/http://promo.net/pg/"$$FG$.
*) John Carmack inspired Terry to use "$LK,"Clamp",A="MN:Clamp"$" as a name instead of "Limit". He inspired Terry to use "needle" and "haystack" as names. He inspired Terry to simplify his Frames-Per-Second code.
*) The random number generator is from Donald Knuth in the wikipedia entry for $TX,"Linear_congruential_generator",HTML="http://en.wikipedia.org/wiki/Linear_congruential_generator"$.