Most people are familiar with the term “apps”, which is simply an abbreviation of “applications” that are simply computer programs with a user-friendly interface. There are now hundreds of apps available on the Apple App Store that people download onto their iPhones and iPads providing both games and useful tools to book flights, identify music tracks from their audible signature or monitor your heart rate during exercise. These are great for personal use and tend to be easy to obtain at little or no cost.
2000 metres. This altitude above sea level represents the upper limit for applications of many passive components certified according to IEC. Why this limit? A little excursus into physics, more precisely into the Paschen effect.











