John Varley said this quote

“ When I started writing I wanted the best tools. I skipped right over chisels on rocks, stylus on wet clay plates, quills and fountain pens, even mechanical pencils, and went straight to one of the first popular spin-offs of the aerospace program: the ballpoint pen. They were developed for comber navigators in the war because fountain pens would squirt all over your leather bomber jacket at altitude. (I have a cherished example of the next generation ballpoint, a pressurized Space Pen cleverly designed to work in weightlessness, given to me by Spider Robinson. At least, I cherish it when I can find it. It is also cleverly designed to seek out the lowest point of your desk, roll off, then find the lowest point on the floor, under a heavy piece of furniture. That's because it is cylindrical and lacks a pocket clip to keep it from rolling. In space, I presume it would float out of your pocket and find a forgotten corner of your spacecraft to hide in. NASA spent $3 million developing it. Good job, guys. I'm sure it's around here somewhere.) ”