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.
Fields relating to the environment: 1  Aerobiology (pronunciation) â The study of airborne organic particles.  Astrobiology (pronunciation) â The branch of biology concerned with the effects of outer space on living organisms and with the search for extraterrestrial life.
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.