Ops are executed by jd (jd'...') and can run in the user Jd task or on a server Jd task. Ops are documented in the following families:
Some ops include an example that can run in your current session (examples save/restore current jdaccess).
jdex_jd_'' NB. list ops with example ... jdex_jd_'insert'
Tutorials show Jd in action:
jdrt_jd_'' NB. list tutorials ... jdrt_jd_'intro'