Modern memory management isn't as simple as knowing that you have 150MB of programs to run and 256MB of memory to do it in. Modern Unix-like operating systems have their own characteristics for allocating and using memory. Howard Feldman explains how this works and shows how to analyze and reduce the memory consumption of your programs, no matter what language you use.

The momentum generated by Apple's iPod digital music players and related products continues to translate into new Macintosh sales according to one Wall Street analyst who estimates that over one million Windows users have purchased a Mac in the first three quarters of 2005.

"Whether you're a buyer or a seller of a product, the essential goal of standardization is to make interoperability possible, allowing communication with anyone else using the same protocol and media. In some cases though, vendors have specific reasons for not being compatible - and those vendors have developed a standard for incompatibility, digital rights management. The goal of DRM is to limit compatibility because things which are compatible can be copied and distributed freely. In this article, Peter Seebach looks at a potential oxymoron - standards designed to subvert and prevent interoperability."

In light of the many misunderstandings about Linux, software repositories and installation of packages, part one of this season's Mandriva Linux 2006 review includes an extensive background article about it. It explains why the nature of Free Software leads to a more userfriendly software installation setup for Linux distributions in general, as compared to proprietary systems such as the current desktop market leader. The process is illustrated with Mandriva Linux tools. This first part of the Mandriva Linux 2006 review also contains information on the installation and benchmark figures against previous Mandriva/Mandrake products, amongst other things.

Coming from his background in Java development, the concept of using delegates and categories, as opposed to subclassing, was a bit foreign to Marcus Zarra. In Java subclassing, nearly everything was quite common. So common in fact, that Sun provided generic subclasses in quite a few cases. Objective-C and Cocoa, however, have a different approach. Marcus walks you through the different approaches used in Objective-C programming. Also: the Java platform includes a number of packages that are concerned with the movement of data into and out of programs. These packages differ in the kinds of abstractions they provide for dealing with I/O (input/output). This chapter covers primarily the stream-based model of the java.io package.

UNIX was a terrific workhorse for its time, but eventually the old nag needs to be put out to pasture. David Chisnall argues that it's time to retire UNIX in favor of modern systems with a lot more horsepower. "UNIX has a lot of strengths, but like any other design it's starting to show its age. Some of the points listed in this article apply less to some UNIX-like systems, some apply more."