Technical

Bold: more relevant

Light: older, less relevant, or not interested anymore.

Center: core skills

Periphery: less experienced, or skills formerly practiced

programming languages

Core skill

operating systems

frameworks

STL

yacc

lex

Qt

MFC

MacApp

PowerPlant

UIMX

X-Motif

xlibs

xtoolkit

ODBC

QuickTime

flutter

un*x

macos

windows

linux

android

zOS

BSD

debian

ubuntu

redhat & Co

AIX

HP/UX

solaris

IRIX

RPG

javascript

fortran

object pascal

perl

python

VB

html

C++

SQL

php

dart

pascal

modula 2

bash

ksh

AionDS

xBase

applescript

hypercard

asm

C