However, a school districtâs actual communication network can be very different from the pattern of communication established by its formal organizational structure. Four main communication roles have emerged in network analysis: gatekeepers, liaisons, bridges, and isolates (Belussi, 2012).
People from all over the world know the four most popular types of the Pall Mall cigarettes. 1  1.Pall Mall Filters - most probably the best-selling variety. These cigarettes have an intense and stimulating taste. 2  2.Pall Mall Lights - usually preferred by women smokers because of a milder taste and delicate aroma.
There are 4 different styles of electronic cigarettes (e cigs or e cigarettes for short) you should be familiar with before you start looking at different electronic cigarette brands, suppliers and manufacturers. These four styles shouldnât be confused with what I call the 4 different types of electronic cigarettes. The difference between the 4 styles and the 4 types is that the term âstyleâ refers to appearances and the term âtypeâ refers primarily to function.