These days the high technologies give citizens an unparalleled possibility to facilitate and prettify their life by means of modern developments and arrangements. The theme of the article tells about iphone theme and some other related items for pocket digital assistant. PDA is a pure computer thus it doesn’t have the features of the phone. It may reproduce video files, music files, work as a record book, operate with word processors and some other kinds of handy programs. In other words, the PDA would be quite useful for citizens that don’t keep still for a long time and that do not prefer to diddle away the time in the course of journeys. It’s possible for you to utilize free gps windows mobile in the process of long journeys. There’s no necessity for you to have by you a thick book. Remembering that the PDA may contain more than one book, the gadget becomes very much precious. Recognizing that the arrangement is multitasking, one may enjoy the audio in the course of reading a book. If you’re concerned in Free software for mobile, you should search online.There’s no PDA that would not be equipped with the OS (operating system). Selecting a PDA you need to arrive at a decision about its operational system: PalmOS, Microsoft Windows Mobile or Linux. The advantage of Linux is availability of gratuitous programs, though Windows is more habitual to regular users. PalmOS has been particularly developed for the PDA that’s why it is easy to use though if you use several tools at the same time there may be faults. Although the choice of the OS is quite pressing, you should not also overlook such essential parameters as computer power, input medium, space of permanent memory and internal memory, screen size and whether the memory may be extended or not.The problem of any PDA is power demand. At this stage no maker may take pride in high effects in this area.