PSPP Is A Open Source SPSS

I am trying to understand how to import data from a spreadsheet.  The manual says to define the variables this way:

PSPP> data list list /forename (A12) height.
PSPP> begin data.
data> Ahmed 188
data> Bertram 167
data> Catherine 134.231
data> David 109.1
data> end data
PSPP>

But there is no apparent command line mode that I can find.  Nor does the Data menu have any obvious way to identify variables.