The term 'SLOTS FEATURE' can be broken down into two crossword solutions: ARM (3 letters). ARM stands for Advanced RISC Machine, which is a type of microprocessor architecture developed by ARM Holdings. It is a 32-bit reduced instruction set computer (RISC) that is used in many mobile devices, such as smartphones and tablets. The SLOTS FEATURE refers to the ability of the ARM processor to support multiple slots, allowing for more memory and other features to be added. This feature makes ARM processors ideal for use in mobile devices, as they can be easily upgraded with additional features.