1. ● Firewall
● Corporate database
● CGI
● Subcontractor

2. Conporate Database
There is “Oracle Database” as one of Corporate
Database. This is business RDBMS(Relational
Database Management System), and it supports
many platform, for example, mainframe, Personal
Computer. Corporate Database can be made over
the intranet, on the other hand, Oracle Database is
very expensive and difficult system.

4. CGI
CGI is a structure to start a program that Web
server accepts the demand from a Web browser

5. Subcontractor
Mind of subcontract in contract relation to main
contractor (main
contractor).

6. Reference
● http://srgia.com/docs/oracle-j.jpg
● http://www.site-cooler.com/kwl/img/perl/cgi.gif
● http://itpro.nikkeibp.co.jp/article/COLUMN/2007
0125/259646/zu16.jpg