How Smoke Alarms Work. Smoke alarms, which are also called smoke detectors, work by constantly checking the air for traces of the gasses and smoke particles produced by a fire. There are two types of smoke alarms-ionization alarms and photoelectric alarms.moke alarms, which are also called smoke detectors, work by constantly checking the air for traces of the gasses and smoke particles produced by a fire.
Exporting items from OST to PST is the best way to create backup of OST file. If you are connected with Exchange server, you can easily do this via manual method. In other case, you should try some third party tool.
If you want to back up your apps, you have to do it through iTunes. An iTunes Backup is also the best choice If you have a lot of large files or want networked backups. To perform an iTunes backup, plug your iOS device into your Mac or PC, select it in iTunes, and check This Computer under Automatically Back Up.