DSLR (Digital Single Lens Reflex)

A digital still image camera that uses a single lens reflex (SLR) mechanism. Most professional cameras have always been single lens reflex cameras, although analog. Digital SLRs began to emerge in the early 1990s, but became very popular after the turn of the century. Following are the two major differences between DSLRs and standard digital cameras.

Removable Lenses
No single lens can accommodate every photographic requirement, and SLR cameras have always used removable lenses. A wide variety of lenses are available for each camera system, and many lenses that fit 35 mm analog SLRs also fit digital SLRs. However, the CCD or CMOS sensor in all but high-end digital SLRs is generally not as large as a 35 mm frame, and 35 mm lenses produce different focal lengths

The Java Programming Language

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History

The Java programming Language evolved from a language named Oak. Oak was developed in the early nineties at Sun Microsystems as a platform-independent language aimed at allowing entertainment appliances such as video game consoles and VCRs to communicate . Oak was first slated to appear in television set-top boxes designed to provide video-on-demand services. Just as the deals with the set-top box manufacturers were falling through, the World Wide Web was coming to life. As Oak’s developers began to re cognize this trend, their focus shifted to the Internet and WebRunner, an Oak-enabled browser, was born. Oak’s name was changed to Java and WebRunner became the HotJava web browser. The excitement of the Internet attracted software vendors such that Jav a development tools from many vendors quickly became available. That same excitement has provided the impetus for a multitude of software developers to discover Java and its many wonderful features.

The Icon Programming Language

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History

Icon is a derivation of SNOBOL, a language originally designed by Bell Telephone Laboratories in the early 60s to promote development of string and structure intensive applications. Further implementations of Icon have been produced by The University of Arizona . The name Icon was chosen before the term "icon" became popular for GUI images in use today and does not stand for anything correlating to the language (apparently it is just a catchy name). The Latest Implementations of Icon and the Icon program library are 9.1 and 9.2, respectively. Version 9.3 of Icon and the next version of the Icon Library is scheduled for release in the fourth quarter of 1996. Platforms supported include UNIX, MS-DOS, MS-DOS 32-bit, VAX/VMS, Macintosh/MPW, and Acorn Archimedes, while versions for Microsoft Windows and NT are in beta testing. Icon can be implemented as an interpreted or compiled language. Interpreting Icon is useful for small programs, or when debugging. Compiling Icon will first translate to C code, which must then be recompiled as C.

The HTML Programming Language

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History

HTML, which stands for HyperText Mark-Up Language, is the language for describing structured documents as well as the language used to create web pages in the Internet. The language is based on an existing, international formatting standard SGML, Standard Generalized Mark-Up Language, which is used for text processing. HTML is a simplified version of SGML.

Difference Between LCD and LED Display

LCD (Liquid Crystal Display) and LED (Light Emitting Diode) Displays are two major display technologies being widely used today. LED Displays are technological advancement of LCD displays. LED displays are the LCD displays with an LED backlight to power up the LCD panel. It means that LEDs are placed behind or around the LCD panel to enhance the luminosity and video definition of the monitor screen. Cold cathode lights are used as backlight in LCD displays. In LED displays all the concepts are same except this backlight feature, which is replaced by LEDs.

Best Free Antivirus Software

Introduction

Antivirus software provides an essential layer of protection from viruses, trojans, worms, spyware, adware, dialers, keyloggers, and rootkits. Don't let the name antivirus confuse you. These days every good antivirus has good detection rates for all forms of malware, not just viruses. The term malware includes viruses, trojans, worms, spyware, adware, dialers, keyloggers, rootkits, and any other software which performs malicious activities on a computer.

Best Free Portable Applications

Introduction :

This list provides a collection of portable apps from across Gizmo's Freeware and other sites. Portable freeware is an amazing development and is forcing software vendors to adjust their wasteful ways. They reduce problems with uninstalling software (you just delete them and don't have to worry about failed installs or incomplete uninstalls), they allow for extra flexibility in copying or moving software to different locations on a portable device or on a PC, and they help improve your privacy and security by running from portable devices like flash drives. Take your "computer setup" with you, keep every piece of free software that impresses you or run them, say, at a library. I suggest starting a collection, or an army actually, of your favorite portable apps instead of trying to minimize the number of programs you install. For an introduction to portable software, read the Guide to Portable Applications.