In two films about the Titanic, Murdoch was portrayed shooting passengers and himself during the sinking; this was based on a number of eyewitness testimonies of a shooting/suicide by an officer during the launching of the last lifeboat. It is possible that Murdoch was the officer.
In general, to append is to join or add on to the end of something. For example, an appendix is a section appended (added to the end) of a document. In computer programming, append is the name of a procedure for concatenating (linked) lists or arrays in some high-level programming languages.
Addend is a mathematical term that refers to the numbers being added together in an addition problem. The word 'addend' was first used in the early 1900's and comes from the Latin word 'addendus' which means 'to be added.'. Addends are sometimes referred to as summands, and the first addend in a sequence is also called the augend. Any term can be an addend, it does not have to be a number.