of opcode sequences. These are called overlapping instructions, overlapping opcodes, overlapping code, overlapped code, instruction scission, or jump into the middle of an instruction.

In the 1970s and 1980s, overlapping instructions were sometimes used to preserve memory space. One example was in the implementation of error tables in Microsoft's Altair BASIC, where interleaved instructions mutually shared their instruction bytes. The technique is rarely used today,