Software, as a collection of code and instructions, is not stored as either energy or matter on a computer. Instead, it is represented as digital information stored in the form of binary data (0s and 1s) on storage devices such as hard drives or solid-state drives.
The digital information that makes up software is stored as electrical or magnetic signals in electronic components within the computer's hardware. These signals represent the instructions and data that the computer processes to execute the software.
So, while software itself is not energy or matter, it requires both energy and physical hardware (matter) to be stored, processed, and executed on a computer. The computer's hardware utilizes energy to read, write, and process the digital information that represents the software.