Once upon a time a kid me realized that anything he put in autoexec.bat gets executed when the computer boots. Soon after i figured out how to do branching and

Once upon a time a kid me realized that anything he put in autoexec.bat gets executed when the computer boots. Soon after i figured out how to do branching and input and made a start-menu-of-a-sorts thingy. It only went downhill from there. In other words, it just so happened that my first programming project and interest turned out to be an OS. Took me about 6 years and 12 attempts to actually succeed at making a usable one. Eventually that interest driven my choice of department in the late university, and the OS i made was shown off at my first job interview. I got the job, and that's how i got to writing Linux drivers and kernel tweaks for high-performance (mid-TOP500-ish level) machines for a few years.