Question: What is one thing mattel Developed?

Context paragraphs:
Kitty Black Perkins: Louvenia (Kitty) Black Perkins was Chief Designer of Fashions and Doll Concepts for Mattel's Barbie line for over twenty-five years.  Her designs include "Shani and Friends" (1991) a line of African-American dolls, "Holiday Barbie" (1988, 1989, 1990, 1996), "Fashion Savvy Barbie" (1997), "Bathtime Barbie" and "Brandy" (1999).  Brandy Barbie became one of Mattel's biggest sellers An African-American woman, Kitty was born February 13, 1948 in racially segregated Spartanburg, South Carolina.  The daughter of Luther Black and Helen Goode Black, she is one of seven children.  She graduated from Carver High School, Spartanburg's black High School, which closed when the school system was desegregated in 1970.  In 1967 she moved to California, attending Los Angeles Trade Technical College.  Black graduated with an associate degree in fashion design in 1971.  She worked in non-doll fashion for six years before responding to a blind classified ad from Mattel.  She reports never having had a Barbie doll until she purchased one to prepare for the interview.  She became principal designer for Barbie in 1978.  In 1991 The Los Angeles Times reported that Black-Perkins was responsible for over 100 designs a year, amounting to over one fifth of all of the designs for Barbie.  She has received the doll industry's highest honor, the Doll of the Year (DOTY) award.

Metaphor: A metaphor is a figure of speech that refers, for rhetorical effect, to one thing by mentioning another thing.  It may provide clarity or identify hidden similarities between two ideas.  Antithesis, hyperbole, metonymy and simile are all types of metaphor.  One of the most commonly cited examples of a metaphor in English literature is the "All the world's a stage" monologue from "As You Like It":

Buddhist Views on Romantic Relationships: In regards to romantic relationships, Buddhism has very liberal views.  Buddhism encourages independence through non attachment.  Non attachment is the idea that in order to be fulfilled and happy in life, a person cannot be attached to any one thing because this thing can cause suffering.  In order to be happy and to follow the path of enlightenment, Buddhism teaches people to discard all things in life that can cause pain.  This idea is not referring to worldly objects in the physical sense, but in a spiritual sense.  To achieve non attachment, one must detach from the idea of a perfect person and holding one’s partner to an impossible standard.  Instead, one must accept a partner for who they are unconditionally.  In Buddhism, this is the key to a happy romantic relationship.  Accepting a partner for who they are, for who they are throughout their life no matter what changes, and making the best of every situation is how one achieves personal fulfillment in a romantic relationship.

The Red Notebook: The Red Notebook is the title story in a story collection by the same name by Paul Auster.  The book consists of four parts, all stories which had appeared previously: "The Red Notebook" (1995), "Why Write?"  (1996), "Accident Report" (1999) and "It Don't Mean a Thing" (2000).  They are true stories gathered from Auster's life as well as the lives of his friends and acquaintances and they have all one thing in common: the paradox of coincidence.  Auster narrates things he writes about in his fiction, making one wonder if he's really telling the truth.  Implying that everything and everyone is somehow, mysteriously, connected to each other.

Westwood, East Kilbride: Westwood is an area of the Scottish new town East Kilbride.  It was name-checked by one of its former inhabitants, Roddy Frame of Aztec Camera, in the song "Somewhere In My Heart".  Part of the song's lyrics proclaim ""From Westwood to Hollywood, The one thing that's understood, Is that you can't buy time, But you can sell your soul, And the closest thing to heaven is rock and roll"".

Trade-off: A trade-off (or tradeoff) is a situation that involves losing one quality, aspect or amount of something in return for gaining another quality, aspect or amount.  More colloquially, if one thing increases, some other thing must decrease.  Tradeoffs can occur for many reasons, including simple physics (into a given amount of space, you can fit many small objects or fewer large objects).  To give an everyday example, a person packing her suitcase for a holiday, assuming the airline only allows one suitcase of a maximum size, has to make trade-offs in the items she packs.  If her suitcase, in her initial packing attempt, only consisted of clothing, to add toiletries to her suitcase, every toiletry item she adds will lead to a trade-off of less clothing.  The idea of a tradeoff often implies a decision to be made with full comprehension of both the upside and downside of a particular choice, such as when a person decides whether to invest in stocks (more risky but with a greater potential return) versus bonds (generally safer, but lower potential returns).

Pratiyogitvam: Pratiyogitvam, a Sanskrit term, means recognizing 'difference' by noting the 'otherness' in another thing; 'difference' means - 'the want of the total characteristic of one thing in another'.  Differences are of three kinds – a) 'difference existing in oneself' ("svajātiya-bheda"), b) 'difference in species' ("svagata-bheda"), and c) 'difference of genus' ("vijātiya-bheda").  These differences do not exist in Brahman who is one without a second.  The Upanishads negate these differences in Brahman who is self-revealing and can be experienced when all mentations cease, what is then experienced is not nothing, for there can be no knowledge of a thing that does not exist.

Relation (history of concept): The concept of relation as a term used in general philosophy has a long and complicated history.  One of the interests for the Greek philosophers lay in the number of ways in which a particular thing might be described, and the establishment of a relation between one thing and another was one of these.  A second interest lay in the difference between these relations and the things themselves.  This was to culminate in the view that the things in themselves could not be known except through their relations.  Debates similar to these continue into modern philosophy and include further investigations into types of relation and whether relations exist only in the mind or the real world or both.

Mattel: Mattel, Inc. ( ) is an American multinational toy manufacturing company founded in 1945 with headquarters in El Segundo, California.  In 2014, it ranked #403 on the Fortune 500 list.  The products and brands it produces include Fisher-Price, Barbie dolls, Monster High dolls, Ever After High dolls, Winx Club dolls, Hot Wheels and Matchbox toys, Masters of the Universe toys, American Girl dolls, board games, and WWE toys.  In the early 1980's, Mattel produced video game systems, under its own brands and under license from Nintendo.  The company has presence in 40 countries and territories and sells products in more than 150 nations.  The company operates through three business segments: North America, international, and American Girl.  It is the world's largest toy maker in terms of revenue.  On January 17, 2017, Mattel named Google executive Margo Georgiadis as its next CEO.

Avoid One Thing: Avoid One Thing was started as a side project by The Mighty Mighty Bosstones' bassist Joe Gittleman.  The Boston-based group's first album, titled "Avoid One Thing", was released in 2002 on Side One Dummy Records.  The album was written and recorded almost solely by Gittleman.  Gittleman assembled a band with which to tour and play his music.  Before the release of the band's next album in 2004, the band went through several lineup changes.  John Lynch joined the band after Dave Karcich's death due to a sudden brain aneurysm.  Later, Delano left and the band continued as a three-piece.  The trio returned to the studio and released "Chopstick Bridge" on May 4, 2004.  The album reflected the combined efforts of all three band members and sounds vastly different from their first in many respects; Amy Griffin and Gittleman even split lead vocals on a few tracks.  After the release of this album, the band toured until February 2005 before going on hiatus.  Since that time, Griffin has been playing guitar for Darkbuster and Gittleman has moved to Los Angeles and is once again a member of the reunited Bosstones.  Paul Delano underwent emergency surgery in 2006 and a series of benefit shows were held.  John Lynch has since joined up with David Minehan and is now playing drums for The Neighborhoods.

Supporting paragraphs: Kitty Black Perkins Mattel
Answer: Fashions and Doll Concepts