I am 67 years old. I retired 12 years ago. Most of my career was with designing, repairing and installing audio systems.
My first job was fixing then designing car radios with Philips for Chrysler cars. I saw their first LED and I worked with their new audio cassette recorders and players (Philips invented the cassette tape system). Then Philips office computers (DTL logic ICs and millions of ferrite cores were its RAM memory) and punched cards were its operating program. Then Philips huge intercom systems. Then I designed, fixed and installed large very high quality intercom systems and telephone systems for a smaller company for 15 years.
Then I joined an upcoming American Tele-conferencing company in Canada. Then I joined a Japanese Pro audio manufacturer company. Then I retired but continued making changes with audio and intercom systems for a few years.
Now I since I am retired, I do whatever I want whenever I want and it is
WONDERFUL.