An e-reader, also called an e-book reader or e-book device, is a mobile electronic device that is designed primarily for the purpose of reading e-books and digital periodicals. An e-reader is similar in form, but more limited in purpose than a tablet.-book reading is increasing in the US; by 2014 28% of adults had read an e-book, compared to 23% in 2013.
1 Ecology (pronunciation) â The study of the interaction of organisms with each other and with their environment.  Geobiology (pronunciation) â A science that combines geology and biology to study the interactions of organisms with their environment.
There are several different fields within the field of microbiology. 1  An example of some of these fields broken down by type of organism includes: 2  Parasitology - The study of parasitology. 3  Mycology - The study of fungi. 4  Bacteriology - The study of bacteria. 5  Virology - The study of viruses. 6  Protozoology - The study of protozoa.