Comment by lispm
"usually" probably means at the time of writing this book. lambda, car and cdr are from the 50s/60s when short names were preferred for various reasons (small memory, input on cards, output on paper, small screens, ...).
"usually" probably means at the time of writing this book. lambda, car and cdr are from the 50s/60s when short names were preferred for various reasons (small memory, input on cards, output on paper, small screens, ...).