I came from a third world country and in the mid 2000s when I was in college, a number of us CS students didn't even have a personal computer. So we would maximize our 3-hour weekly laboratory time doing our machine problems. Most of times that's not enough. So we save our source code to flash drives and go to a computer shop to finish up our code. But computer shops charge us by the hour and most of us who had no computers were poor to begin with. So we copy paste our source code into Microsoft Word, have the code printed, then analyze the code back in dorm by reading the source code from the paper. We debug straight from the paper. It's like we are proofreading the source code. We use our pens to add notes on what needs to change and what needs to get added. And its effective. The next day when we go back to the computer shop, we only spend about 15 minutes implementing the "proofreading" notes we had on our paper, and our source code will compile and execute successfully. We use portable compilers as we can't really install any program to the shop's computers. Sometimes we need to explain our predicament to the shop owner so they won't think we're hacking their computers, lol.

This only happened in our freshman year though. Beginning in our sophomore year, if we are still a CS student (a lot of first year CS students eventually shift to other majors), there are a number of financing options we can avail so we can purchase a laptop.