501(c) organization

A 501(c) organization, also known colloquially as a 501(c), is a tax-exempt nonprofit organization in the United States. Section 501(c) of the United States Internal Revenue Code (26 U.S.C. § 501(c)) provides that 29 types of nonprofit organizations are exempt from some federal income taxes. Sections 503 through 505 set out the requirements for attaining such exemptions. Many states refer to Section 501(c) for definitions of organizations exempt from state taxation as well. 501(c) organizations can receive unlimited contributions from individuals, corporations, and unions.

The most common type of tax-exempt nonprofit organization falls under category 501(c)(3), whereby a nonprofit organization is exempt from federal income tax if its activities have the following purposes: charitable, religious, educational, scientific, literary, testing for public safety, fostering amateur sports competition, or preventing cruelty to children or animals. The 501(c)(4) and 501(c)(6) categories are for politically active nonprofits, which have become increasingly important since the 2004 presidential election.

C3

C3, C-3, C.3, C03, C.III or C-III may refer to:

Life and biology

Military

Composition C

The Composition C family is a family of related US-specified plastic explosives consisting primarily of RDX. All can be moulded by hand for use in demolition work and packed by hand into shaped charge devices. Variants have different proportions and plasticisers and include composition C-2, composition C-3, and composition C-4.

The term composition is used for any explosive material compounded from several ingredients. In particular, in the 1940s the format "Composition <letter>" was used for various compositions of the (relatively) novel explosive RDX, such as Composition B and other variants.

The original material was developed by the British during World War II, and standardised as Composition C when introduced to US service. This material consisted of 88.3% RDX and a mineral oil-based plasticiser and phlegmatiser. It suffered from a relatively limited range of serviceable temperatures, and was replaced by Composition C-2 around 1943.

Composition C-2 contained a slightly smaller proportion of RDX, but used an explosive plasticiser, which contained tetryl, nitrocellulose and a mixture of nitroaromatics produced during the manufacture of TNT (containing trinitrotoluene, dinitrotoluene and mononitrotoluene), and a trace of solvent. While Composition C-2 had a much wider serviceable temperature range than Composition C, it could not be stored at elevated temperatures. Consequently it was replaced around 1944 by Composition C-3.

C3 (light novel)

C³, also known as C Cube (シーキューブ, Shīkyūbu) or Cube×Cursed×Curious, is a Japanese light novel series written by Hazuki Minase and illustrated by Sasorigatame about Haruaki Yachi who receives a mysterious black cube from his father. That night, Haruaki is woken by a noise and finds a girl named Fear in his kitchen eating rice crackers. Haruaki then has to protect Fear from organizations that seek to capture or destroy her. Luckily, Haruaki has plenty of other friends like Fear willing to help. It was adapted into a manga and anime series at the second half of 2011.

Plot

The story begins with high-school student Yachi Haruaki receiving a mysterious package, a super-heavy black cube from his father overseas. That night, Haruaki wakes to a suspicious noise in the kitchen and discovers a cute-looking stark-naked female stealing rice crackers. After the embarrassing moment, the girl presents herself. Her name is Fear (pronounced "Fia" in Japanese), and she is the first of several surprises that Haruaki is to receive.