The latest release of firmware for the Cardputer includes a new autocomplete feature that saves you typing by letting you enter a built-in keyword by typing just the first few characters followed by tab.
The keyword will be completed with one of the uLisp built-in symbols. If there are several keywords starting with what you typed, pressing tab cycles between them.
If you have loaded a uLisp Extensions File, autocomplete will include any symbols you have defined in your extensions.
Because autocomplete traditionally uses tab, the function to copy the last line has been moved to shift-↩.
Download the Cardputer uLisp firmware from https://github.com/technoblogy/ulisp-cardputer.
The autocomplete feature was contributed by user @hasn0life.