Worked on everything from mainframe time share systems and JES using various terminal command languages (JCL, Rosco, etc.) Coding applications in PL1, Cobol, Fortran, IBM Assembler, etc. Real old school stuff. Built my first two computers via HeathKit (H89 and H100). Remember those? Since then I`ve always maintained several Desktop and laptop PC`s around the house, including tablets, a MacBook, and smartphones. I`ve worked and played through operating systems from DOS through to Windows 10 and MAC OS El Capitan. So, as you may have guessed by now, I`m not new to this technology. I retired as an IT Manager in the government, responsible for large Network configuration designs in everything from Token Ring (Novell Netware Servers) to Ethernet (MS Exchange Servers). Retired 12 years now and still having fun with this stuff. Cheers. ©