[a_e_k]

Yep. The "tiny" model gave you a single 64KB segment shared by both code and data. And the "small" model was the one where there was one 64KB segment each for code and data.

IIRC, with the tiny model you could often compile those to .COM files where MS-DOS would pick a free segment, load the file to the 0x100 offset, set all the segment registers to it, set the stack pointer to 0x0, and jump to the start at 0x100. Super simple (not even an executable header)!