Microbiology (from Greek μῑκρος, mīkros, "small"; βίος, bios, "life"; and -λογία, -logia) is the study of microscopic organisms, which are defined as any living organism that is either a single cell (unicellular), a cell cluster, or has no cells at all (acellular). This includes eukaryotes, such as fungi and protists, and prokaryotes. Viruses and prions, though not strictly classed as living organisms, are also studied. Microbiology typically includes the study of the immune system, or immunology. Generally, immune systems interact with pathogenic microbes; these two disciplines often intersect which is why many colleges offer a paired degree such as "Microbiology and Immunology".

Microbiology is a broad term which includes virology, mycology, parasitology, bacteriology, immunology and other branches. A microbiologist is a specialist in microbiology and these related topics.

B-boying or breaking, often called "breakdancing", is a style of street dance that originated as a part of hip-hop culture among African American and Latino youths in New York City during the early 1970s. Fast to gain popularity in the media, the dance style also gained popularity worldwide especially in South Korea, France, Russia, Japan, and Brazil. While extremely diverse in the amount of variation available in the dance, b-boying consists of four primary elements: toprock, downrock, power moves, and freezes. B-boying is typically danced to hip-hop and especially breakbeats, although modern trends allow for much wider varieties of music along certain ranges of tempo and beat patterns.

A practitioner of this dance is called a b-boy, b-girl, or breaker. Although the term "breakdance" is frequently used to refer to the dance, "b-boying" and "breaking" are the original terms. These terms are preferred by the majority of the art form’s pioneers and most notable practitioners.

The terminology used to refer to b-boying changed after promotion by the mainstream media. Although widespread, the term "breakdancing" is looked down upon by those immersed in hip-hop culture. Purists consider "breakdancing" an ignorant term invented by the media that connotes exploitation of the art and is used to sensationalize breaking. The term "breakdancing" is also problematic because it has become a diluted umbrella term that incorrectly includes popping, locking, and electric boogaloo. Popping, locking, and electric boogaloo are not styles of "breakdance". They are funk styles that were developed separately from breaking in California. The dance itself is properly called "breaking" according to rappers such as KRS-One, Talib Kweli, Mos Def, and Darryl McDaniels of Run-DMC.