org-iswitchb
org-iswitchb is an alias for `org-switchb' in `org.el
'.
(org-iswitchb &optional ARG)
Switch between Org buffers.
With one prefix argument, restrict available buffers to files.
With two prefix arguments, restrict available buffers to agenda files.
Defaults to `iswitchb' for buffer name completion.
Set `org-completion-use-ido' to make it use ido instead.