Known as a device that can be used in homes and business establishments to detect smoke, a smoke alarm is very essential to prevent the occurrence of fire in offices and houses. Most of these devices have an optical detector that can detect particulates caused by fire. There are different types of smoke alarms, which include laser, aspirating, beam, photoelectric as well as ionization. According to a report released by the U.S. National Institute of Standards and Technology, the ionization type is very efficient in providing signals or warnings. Owning a smoke alarm in commercial places and homes is beneficial. To avoid experiencing troubles, it is important that owners know if the device is not functioning well. It is also necessary that individuals know how to address the common problems...

One of the most famous and useful audio and video devices today, iPod is a special and advance product line developed and introduced by Apple Inc. This brand was officially launched by the company on the 23rd day of October in 2001. Some of the products featured in this line are iPod Touch, iPod Shuffle and iPod Nano. These electronic gadgets have flash memory, which are very helpful in storing hundreds of songs and videos. In addition, the devices can be used as external data storage tools. The memory of the hard drive installed in the devices differs on the models. To know why it is called an iPod, it is important to have a quick look at the history of the development of the product line. Design and History Why is it called an iPod? The product line is called an iPod because “I” pertains...