Past focus: development (Fortran, C), QA (IEEE, ISO), and Test (shell scripting, test suites). Past work (jobs): Tektronix, Intel, Network General, Mentor Graphics, Cypress Semiconductor. Current focus: coding (SQLite, Python, PyQt5, PyCharm); cross-platform, backward-compatibility, and platform-independence (e.g., FreeBSD 12, Ubuntu 19/18/16, Windows 10/7, macos/OSX/MacOSX). Current work: self-managed software research and development.