ASPL 1> v
view the variables

ASPL 2> v d a1
view descriptor of variable a1

ASPL 3> ans
view the answer stack

ASPL 4> display a1
display variable a1

ASPL 5> f& a1 a2
intersect a1 and a2

ASPL 6> f&`mtm~ a1 a2
intersect a1 and a2 for these elements (or files) that have different modification time

ASPL 7> ans
view the answer stack

ASPL 8> a12 = f& a1 a2
assign to variable a12 the intersection of a1 and a2

ASPL 9> v
view the variables

ASPL 10> h
view the history

ASPL 11> hs
view all history of the workspace WS1

ASPL 12> save WS1TEST
save workspace to workspace WS1TEST

ASPL 13> wid
blablabla etc......

ASPL 14> wls
blablabla etc......

ASPL 15> quit
blablabla etc......