42 2. Spaces entered in lines will be preserved, including those at the end of the line. This allows blank lines to be entered eg 10 space RETURN to separate program sections. Some of the programs above have such blank lines. Because of this you should avoid using COPY past the true end of a line. 3. Most keywords can be abbreviated using a full stop, eg L. for LIST , SA. for SAVE . See chapter 48 for a list of abbreviations.