One of the people who made computers accessible to a wide audience. Many people owe their careers to this man. There are many similarities between Msx and ZX Spectrum. My first computer was a ZX81 and it was pure magic for me to do this:
You might be able to do that on the Spectrum, although I haven't checked the manual, but it is not a valid line for a ZX81.
Correct would be
10 PRINT"WHAT IS YOUR NAME?"
20 INPUT A$
The question would appear at the top of the screen, and the cursor would flash at the bottom awaiting your input. The ZX81 was uppercase only as well, although following the Spectrum, Sinclair basic supported lower case.