Where are environment variables found?

InfoPrint Manager environment variables can be found in these files:

InfoPrint SMIT operator's interface environment file
The name of this file is the value of the PPO_DEFAULT_ENV environment variable, by default, /usr/lpp/pd/bin/ppo.env. It contains environment variables that define values used by the InfoPrint SMIT operator's interface.
/etc/environment
This file contains environment variables that apply to all sessions for all users on a given system.
.profile
The .profile file in a user's home directory contains environment variables that apply to all the user's sessions. Values in this file override values in /etc/environment.