Is all data stored in computers stored as machine code?

I know that the most basic (and least abstract) code for programming is machine code (with binary of 0s and 1s being the typical machine code).

I also know that computers can save data even if they are turned off, by different types of computer memory (storage device memory, RAM and other computer system devices which can "remember" some data).

Is all data stored in computers ("all data remembered in a given computer memory") stored as machine code?
Is what’s saved in a computer’s "memory" (and becoming actually effective by electrical current correctly distributed to the computer system) just binary machine code in the sense that if I could read and understand that data directly without an operating system interfacing it for me it should appear in my mind as machine code, or rather, is it something else?