Which processor architecture is used more often: little-endian or big-endian?

Desktop computers and servers more often use little-endian.

Little-endian architecture:

• The least significant byte is stored at the lowest address.
• Example: Intel (x86, x86-64).

Big-endian architecture:

• The most significant byte is stored at the lowest address.
• Example: early Motorola processors, network protocols (e.g., TCP/IP).

Most modern general-purpose systems (PCs, most servers) are little-endian. Big-endian systems are found in specialized devices (e.g., some embedded systems).