> "Some vendors may have bundled it, but DOS never had it built in." I'm partially incorrect. It clearly was bundled, and not as I said may have been bundled.

> "Some vendors may have bundled it, but DOS never had it built in." I'm partially incorrect. It clearly was bundled, and not as I said may have been bundled. The OP was alluding that it was built in like it was for the CBM64, ZX81 etc. Being bundled and installing it as a separate process is subtly different IMHO. But I will concede that I was wrong to say otherwise.