devstack has shortened names for a number of services, e.g.

• g-api = glance api
• g-reg = glance registry
• n-api = nova api
• n-crt = nova certificate
• n-obj = nova object store
• n-cpu = nova compute
• n-net = nova network
• n-sch = nova scheduler
• n-cauth = nova certificate authentication
• c-sch = cinder scheduler,
• c-api = cinder api
• c-vol = cinder volume

• n-cond is the nova-conductor service, which acts as an intermediary between the compute service and the database.
• n-novnc is the novnc proxy, which is instrumental in providing console access through the web interface.
• n-xvnc is the nova xvpvncproxy service, which is similar to the novnc service but uses a java client for console access rather than the browser.

from: https://ask.openstack.org/en/question/30488/devstack-meaning-of-n-cond-n-novnc-and-n-xvnc/

devstack meaning of: n-cond, n-novnc and n-xvnc