Noob. Try using punch cards (or dial-up on a 75 baud Teletype) into an IBM System 360/67. FORTRAN IV. My Senior year in high school (1969-1970).
And, 24 bit computers? Heck, the PDP-8 was a 12 bit machine. And, C is just a high level language for using PDP-11 Assembly.
I remember people complaining that MS-DOS was "user hostile". Oh, really? Try IBM JCL. Or the NOS operating system on a Cyber 176 (especially as administered by Martin Marietta Data Systems). Those were "user hostile". DOS was a piece of cake by comparison. And, I do miss the VMS OS on the VAX 11/780. That was a nice OS.
Oh, and if you really want old stuff, try paper tape. Thank goodness that digital/analog hybrid in the EE department had an optical reader.