| dntpa | SQL*Net version 2 DECnet Protocol Adapter | 
| guicommon2 | libraries, resource files, scripts, and message files used by several GUI products | 
| lu62pa | SQL*Net version 2 APPC/LU6.2 Protocol Adapter | 
| network | SQL*Net version 2 | 
| mod | SQL*Module | 
| ocommon | libraries and SQL messages.  All products depend on this directory, which is installed automatically | 
| plsql | PL/SQL version 2, procedural option | 
| proada | Pro*Ada | 
| procob | Pro*COBOL | 
| profor | Pro*FORTRAN | 
| propas | Pro*Pascal | 
| pso | install scripts from Oracle Parallel Server option | 
| spxpa | SQL*Net version 2 SPX/IPX Protocol Adapter | 
| sqlplus | SQL*Plus | 
| svrmgr | Server Manager | 
| tcppa | SQL*Net version 2 TCP/IP Protocol Adapter | 
| tk2 | link to the Toolkit II directory, guicommon/tk2 | 
| admin | administrative SQL and shell scripts (for example, catalog.sql, catexp.sql, and demo.sql) | 
| admin/* | special directories for other products | 
| admin/resource | resource files | 
| admin/terminal | runtime terminal files | 
| demo | demonstration scripts and datafiles | 
| doc | README files (for example, readmeunix.doc) | 
| install | product installation scripts | 
| lib | product libraries and distributed makefiles | 
| log | trace files and log files (for example, orasrv.log and *.trc files) | 
| mesg | U.S. message files, and Multilingual Option (formerly National Language Support) message text and binary files (for example, oraus.msg and oraus.msb) | 
Examples of product subdirectories and their contents are:| .a | object file libraries; Ada runtime libraries | 
| .ada | Ada source files | 
| .aud | Oracle audit file | 
| .bdf | X11 font description file | 
| .bmp | X11 bitmap file | 
| .c | C source file | 
| .ctl | SQL*Loader control file;  Oracle Server control file | 
| .dat | SQL*Loader datafile | 
| .dbf | Oracle Server tablespace file | 
| .dei | ORCA de-installation script | 
| .dmp | Export file | 
| .doc | ASCII text file | 
| .env | shell script file for setting environment | 
| .f | FORTRAN source file | 
| .h | C header file;  also, sr.h is a SQL*Report Writer help file | 
| .ins | ORCA installation script | 
| .l | UNIX manual page | 
| .lis | output of SQL*Plus scripts | 
| .log | installation log files;  Oracle Server redo log files | 
| .map | Installer product component files | 
| .mk | make files | 
| .msb | NLS message file (binary) | 
| .msg | NLS message file (text) | 
| .o | object module | 
| .ora | init.ora file;  lisnr.ora file;  kbcus.ora file | 
| .orc | installation prototype files | 
| .pad | Pro*Ada source file | 
| .pc | Pro*C source file | 
| .pco | Pro*COBOL source file | 
| .ppd | printer driver file | 
| .pfo | Pro*FORTRAN source file | 
| .prd | product registration template file (for orainst) | 
| .res | Toolkit II resource file | 
| .sh | Bourne shell script file | 
| .sql | SQL* script files | 
| .sys | Bourne shell script file | 
| .tab | SQL* script file | 
| .tut | Bourne shell script file | 
| .us | orainst message file | 
| .utd | Uniform Terminal Definitions | 
| .vrf | Installer dependencies verification script |