In this second article of three, we will continue our exploration of moving to the Web by having a look at the rest of the common components of Web applications.

Tiered Design

This is probably the most important part of designing any Web application. It is essential that the application is tiered in such a way that the interface is separate from the database is separate from the business logic.

The basic concept is that you should be able to change any of the components without affecting the other components.

Although this has always been a good principle of any

When I began pursuit of my computer science degree eons ago, the only programming experience I had was business programming. Jumping from System/34 RPG II to Pascal was a shock, but learning Pascal was one of the best things that ever happened to me professionally. Learning Pascal introduced me to programming constructs that I had not seen before, including pointer variables, the topic of this article. If you’ve not mastered pointers, continue reading. Do it for your own edification.

RPG has two types of pointer variables: basing pointers, and procedure pointers. Both types of pointers hold memory addresses. Both types

Sometimes you need more information about what’s happening on your system. Who changed their password? Have any system values been changed recently? Who added an entry to the System Reply list? For company security and auditor information, sometimes you need to gather information about system events. That’s where i/OS security auditing comes in.

Security Auditing in Two Paragraphs

IBM i/OS security auditing allows you to collect information about system events that can affect system security and integrity. To implement auditing, a user configures his system and specifies what types of information he wants to collect. After turning auditing on, he