I learned C with K&R (1st ed.) running on Unix v5. Have since upgraded to 2nd ed. and it is very dog-eared. Running mostly on NetBSD and Debian. But have writt

I learned C with K&R (1st ed.) running on Unix v5. Have since upgraded to 2nd ed. and it is very dog-eared. Running mostly on NetBSD and Debian. But have written masses of code on a huge range of Unix systems, e.g. AIX, HP-UX, Solaris, etc. As for p123, yeah mind boggling. But I have never had to do anything that complex in practice. The best thing about well written C programs is that they port easily. I have 20+ year old programs that compile and run fine on new systems, even Mac OS/X. Have avoided porting to Windows. Most of my work is with servers and web front-ends. Lua and quickJS are great for implementing scripting on top of libraries of modules/functions written in C.