[bignerd_95]

If you're referring to little-endianness, it means the CPU stores multi-byte values in memory with the least significant byte first (at the lowest address).

This convention started on early Intel chips and was kept for backward compatibility. It also has a practical benefit: it makes basic arithmetic and type widening cheaper in hardware. The "low" part of the value is always at the base address, so the CPU can load 8 bits, then 16 bits, then 32 bits, etc. starting from the same address without extra offset math.

So when you say an address like 0xABCD shows up in memory as [0xCD, 0xAB] byte-by-byte, that's not the address being "reversed". That's just the little-endian in-memory layout of that numeric value.

There are also big-endian architectures, where the most significant byte is stored at the lowest address. That matches how humans usually write numbers (0xABCD in memory as [0xAB, 0xCD]). But most mainstream desktop/server CPUs today are little-endian, so you mostly see the little-endian view.

[amitprasad]

Not so much the confusion of what little endian is, but how we tend to represent it in notation. Of course this confusion was back when I was first learning things in high school, but I imagine I’m not alone in it