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# HolyC

HolyC (Q22709094 on Wikidata) is the programming language created by Terry A. Davis (Q22708720) for his TempleOS (Q19961543) operating system project during his lifetime. The OS itself is full of a number of Bibalcal references, making people think that the name of «HolyC» is a pun on the «Holy See», the government of the Roman Catholic Church and Vatican City.

The language itself is a dialect of C, designed for simplicity, speed, and direct hardware access, made specifically for use in TempleOS.

HolyC is a mix of standard C and custom language features made by Terry, such as support for inline assembly, automatic macros, co-routines, custom syntax for God-inspired input/output, and built-in documentation commands. It runs in a 16:16-bit real mode environment on x86-64 and compiles incredibly fast due to its integrated compiler.

HolyC is not ANSI C, nor GNU C. It doesn't try to be compatible. It tries to be holy.

# Features

• Extremely fast compilation
• Inline assembly made easy
• First-class support for God dialogs (e.g. ##include for divine inspiration)
• Built-in help system
• Simple file I/O and GUI abstractions for TempleOS
• Runs in ring-0 with full hardware access
• Hot reload
• It is interpreted and compiled, which makes HolyC able to be used as a shell.

HolyC is a pure manifestation of personal computing, unfiltered, unmanaged, unapologetic. It was written not for companies, not for academia, but for God and for the joy of creation.

In an era of bloated languages, garbage collectors, cloud builds, telemetry, and overengineered type systems, HolyC stands alone: small, insane, and beautiful.

# Hello World!

To write a basic Hello World! in HolyC, you would write something like this:

U0 Hello(){
    "Hello World!\n";
}
Hello;

This is not so different from C, that would look like this:

main()
{
    printf("Hello World!\n");
}

# Credits and Notes

• Some or all of the text on this page was written by yehorovye, CC0.
• Hello World written by Barrett Otte, CC0 due to it being so basic, ergo unoriginal.

This page was last edited on 2026-09-09 03:37:48.

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