Classify and group your experience. Then write one resume for each category. One for software developer, one for hardware technician, one for system admin, one

Classify and group your experience. Then write one resume for each category. One for software developer, one for hardware technician, one for system admin, one for entrepreneur/project manager. Then think about which resume to select for each job. Always write a cover letter that discusses your RELEVANT experience, and don't hesitate to customize one of your resumes for a specific job. And leave out an old or unpopular stuff such as RPG IV. Oddly enough I noticed a job just appeared on careers.stackoverflow.com for someone with RGP III or IV experience, but it is the first time in 10 years that I have seen that stuff even mentioned. I thought it had died out in the 70s. If you do want to apply for a job using old stuff like CNC then either make a special one-time resume or edit a stock resume that covers more recent manufacturing stuff. I know people still do CNC but my thinking is that in CA it is likely to be considered outdated since most manufacturing is now outsourced out of the state.