\v [namespace]

Lists the variables in the given namespace, default current namespace.

q)a:1+b:2
q)\v
`a`b
q)\v .h
`HOME`br`c0`c1`logo`sa`sb`sc`tx`ty
q){x where x like"????"}system"v .h"
`HOME`logo

To expunge a from the default namespace

delete a from `.