Frequently Asked Questions
Mobile telephone
A mobile or cellular telephone is a long-range, portable electronic device for personal telecommunications over long distances.
Most current mobile phones connect to a cellular network of base stations (cell sites), which is in turn interconnected to the public switched telephone network (PSTN) (the exception are satellite phones). Cellular networks were first introduced in the early to mid 1980s (the 1G generation). Prior mobile phones operating without a cellular network (the so-called 0G generation), such as Mobile Telephone Service, date back to 1945. Until the mid to late 1980s, most mobile phones were sufficiently large that they were permanently installed in vehicles as car phones. With the advance of miniaturization, currently the vast majority of mobile phones are handheld. In addition to the standard voice function of a telephone, a mobile phone can support many additional services such as SMS for text messaging, email, packet switching for access to the Internet, and MMS for sending and receiving photos and video.
Mobile games
Mobile games are developed using platforms and technologies such as Windows Mobile, Palm OS, Symbian OS, Macromedia's Flash Lite, DoCoMo's DoJa, Sun's J2ME (Java 2 Micro Edition, recently rebranded simply "Java ME"), Qualcomm's BREW (Binary Runtime for Wireless) or Infusio's ExEn (Execution Environment). Other platforms are also available, but not as common.
Java was initially the most common platform for mobile games, however its performance limitations have led to the adoption of various native binary formats for more sophisticated games.
JAVA
Java refers to a number of computer software products and specifications from Sun Microsystems (the Java™ technology) that together provide a system for developing and deploying cross-platform applications. Java is used in a wide variety of computing platforms spanning from embedded devices and cell phones on the low end to enterprise servers and super computers on the high end. Java is fairly ubiquitous in cell phones, Web servers and enterprise applications, and somewhat less common in desktop applications, though users may have come across Java applets when browsing the Web.
J2ME
Java Platform, Micro Edition or Java ME (formerly referred to as Java 2 Platform, Micro Edition or J2ME), is a collection of Java APIs for the development of software for resource-constrained devices such as PDAs, cell phones and other consumer appliances. Java ME is formally a specification, although the term is frequently used to also refer to the runtime implementations of the specification. Java ME was developed under the Java Community Process as JSR 68. The evolution of the platform has abandoned the umbrella Java Specification Request in favor of separate JSRs for the different flavors of Java ME.
Java ME was designed by Sun Microsystems and is a replacement for a similar technology, PersonalJava. Note that Sun only provides a reference implementation and that most work targeting a non-Intel-based small device will require a vendor-supplied JVM to be available on the device.
Java ME has become a popular option for creating games for cell phones, as they can be emulated on a PC during the development stage and easily uploaded to the phone. This contrasts with the difficulty of developing, testing, and loading games for other special gaming platforms such as those made by Nintendo, Sony, and others, as expensive system-specific hardware and kits are required.
MIDlet
A MIDlet is a Java program for embedded devices, more specifically the Java ME virtual machine. Generally, these are games and applications that run on a cell phone.
A MIDlet requires a device that implements Java ME, MIDP to run. Like other Java programs, MIDlets have a "compile once, run anywhere" potential. To write a MIDlet, you can get the Sun Java Wireless Toolkit from the Java website, which is available on several platforms and is completely free. MIDlet distributions also consist of a .jad file describing the contents of the JAR file.
Slideshow
Slideshow is a modern concatenation of "Slide Show". A slideshow is a display of a series of chosen images, which is done for artistic or instructional purposes. Slideshows are conducted by a presenter using an apparatus, such as a carousel slide projector, an overhead projector or in more recent years, a computer running presentation software. The term originates from the use of slides which have been around for many years. Slides originally were projected on movie theater screens by magic lanterns as part of early movie house shows.