I couldn't find this document so I drew it myself. Then I could point to things and get their relationships figured out and record their names correctly. Eventually I did uncover something quite close to this, deep within one of the manuals. It should be in the 10-minute guide, IMHO.

1. <client spec> root: field
depot/
OR <depot spec>, map
field
Client User
Interfaces:
P4v
p4 (cmd line)
Ide (integration)
Defect Tracking
Merge tool (P4/3rd
party)
User must define: P4PORT,
P4CLIENT, P4EDITOR,
P4DIFF, P4MERGE
$P4JOURNAL,
$P4LOG
$P4ROOT
db.* files
(default:) $P4ROOT/
journal, & log, no ext.
“Server”,
aka p4d
TCP/IP
Client
Platform:
Linux
Windows
MacOSX
Unix
(default:) $P4ROOT/
$P4HOST_P4$PORT
CLIENT
SERVER
Admin. must define
P4PORT, P4ROOT,
P4JOURNAL,
Versioned files
in a “Depot”
Metadata
Journal & Log
Client or Work-
Space Files