ORA_NLS32 vs ORA_NLS33 vs ORA_NLS10
ORA_NLS33 and ORA_NLS10 are Oracle environment variables used to locate National Language Support (NLS) files, which dictate how the database handles locales, character sets, and linguistic sorting.
ORA_NLS32
Used for Oracle versions 7.3.x.
ORA_NLS33
Was used for Oracle versions Oracle 8, 8i, and 9i.
It typically points to $ORACLE_HOME/ocommon/nls/admin/data directory
ORA_NLS10
Used for Oracle 10g and later.
It typically points to $ORACLE_HOME/nls/data directory
Deprecation
In Oracle 10g and newer, Oracle embeds the NLS path automatically.
Setting ORA_NLS or ORA_NLS33 is often unnecessary unless you are running legacy 9i applications on a newer client.
If an older client is required to connect to a newer database, you can sometimes set ORA_NLS10 to point to older 9i data files
to preserve backward-compatible definitions
ORACLE_LPPROG and ORACLE_LPARGS
These are legacy Oracle environment variable used on UNIX and Linux operating systems to specify the name or path of the system's line printer spooler utility (LPR).
ORACLE_LPPROG
Defines the command executable itself.
By default, Oracle assumes standard UNIX printing utilities like lp or lpr.
ORACLE_LPARGS
Acts as its companion variable, used to define the command-line arguments or flags passed to that printer program.
ORA-07222
If Oracle tries to print directly from an application and fails due to misconfigured variables,
it will return the operating system-specific error ORA-07222: slspool: line printer spooler command exited with an error.
To resolve that error, one would need to set ORACLE_LPPROG and ORACLE_LPARG properly.
Modern Enterprise
In Modern Enterprise reporting and printing are now handled via middle-tier application servers
rather than spawning command-line lpr processes straight out of the database instance or local terminal profile.
Making these variables obsolete.
ORACLE_TERM
ORACLE_TERM is a legacy Oracle environment variable used to define the terminal type for character-mode Oracle tools,
such as SQL*Plus, Oracle Forms , and Oracle Menu.
It is obsolete as of Oracle 10g.
It tells Oracle how to interpret keystrokes and map functional keyboard shortcuts inside a text-based, terminal-oriented interface.
Key Mapping: It points Oracle to a specific keyboard definition file (a .res or resource file).
Display Layout: It ensures that text-based boxes, lines, and colors render correctly in a command-line terminal window.
Compatibility: It translates hardware terminal signals (like an old VT100 physical terminal or an xterm window) into commands Oracle utilities understand.
ORACLE_TERM vs TERM
The TERM OS variable tells the Linux/UNIX shell how to draw the terminal screen.
ORACLE_TERM tells the Oracle application how to translate your keyboard inputs into database utility commands.
