Sometimes a calculator has two users (typically a couple of brothers - not everyone can afford having two 150 € calculators in the same household for high school children), or there are times where you want to use some user settings, and in other case you want different settings. A question comes: how can settings can be stored or changed?
Settings are stored in different system variables, but not located in a single multi-variable set (list, matrix or string). The solution would imply putting all system variables in one of the above sets, and keep it there for further retrieval.
I have seen such program in hpmuseum.org, written by user Tyann. Here are the two programs required: one to store the current setting - the other to retrieve it later.
//HVars is a list of HOME user defined variables. Handle, Format, etc. are the system settings in Home