Initialism of secondary ion mass spectrometry.
"The new housing development is designed specifically to accommodate hundreds of Sims in a single neighborhood."
plural of Sim
In plain English: Sims are virtual people you can control and interact with in video games.
"Many families play with sims on their tablet to design virtual houses."
A surname, from given names.
"The Sims family has lived in that neighborhood for three generations."
The word sims comes from the name Simon, which was shortened to Sim before taking on an 's' ending. It entered English as a plural noun referring to people named Simon or, in modern usage, computer-generated characters based on that nickname.