Title: Eli Whitney
Content:  Eli Whitney Jr. (December 8, 1765 – January 8, 1825) was an American inventor, widely known for inventing the cotton gin, one of the key inventions of the Industrial Revolution that shaped the economy of the Antebellum South. Whitney's invention made upland short cotton into a profitable crop, which strengthened the economic foundation of slavery in the United States. Despite the social and economic impact of his invention, Whitney lost many profits in legal battles over patent infringement for the cotton gin. Thereafter, he turned his attention into securing contracts with the government in the manufacture of muskets for the newly formed United States Army. He continued making arms and inventing until his death in 1825.
Title: Eli Whitney
Content:  were essential to success. Whitney died of prostate cancer on January 8, 1825, in New Haven, Connecticut, just a month after his 59th birthday. He left a widow and his four children behind. One of his offspring, Eli Whitney III (known as Eli Whitney Jr.), was instrumental in building New Haven, Connecticut's waterworks. During the course of his illness, he reportedly invented and constructed several devices to mechanically ease his pain. The Eli Whitney Students Program, Yale University's admissions program for non-traditional students, is named in honor of Whitney, who not only began his studies there when he was 23, but also went on to graduate Phi Beta Kappa in just three years.
Title: Eli Whitney
Content:  Whitney is most famous for two innovations which came to have significant impacts on the United States in the mid-19th century: the cotton gin (1793) and his advocacy of interchangeable parts. In the South, the cotton gin revolutionized the way cotton was harvested and reinvigorated slavery. Conversely, in the North the adoption of interchangeable parts revolutionized the manufacturing industry, contributing greatly to the U.S. victory in the Civil War.
Title: Eli Whitney
Content:  Whitney was born in Westborough, Massachusetts, on December 8, 1765, the eldest child of Eli Whitney Sr., a prosperous farmer, and his wife Elizabeth Fay, also of Westborough. The younger Eli was famous during his lifetime and after his death by the name "Eli Whitney", though he was technically Eli Whitney Jr. His son, born in 1820, also named Eli, was known during his lifetime and afterward by the name "Eli Whitney, Jr." Whitney's mother, Elizabeth Fay, died in 1777, when he was 11. At age 14 he operated a profitable nail manufacturing operation in his father's workshop during the Revolutionary War. Because his stepmother opposed his wish to attend college, Whitney worked as a farm laborer and school teacher to save money. He prepared for Yale at Leicester Academy (now Becker College) and under the tutelage of Rev. Elizur Goodrich 
Title: Eli Whitney Blake Jr.
Content:  Eli Whitney Blake Jr. (April 20, 1836 – October 1, 1895) was an American scientist. His father and namesake was an inventor and partner of the Blake Brothers manufacturing firm. The origin of the name Eli Whitney comes from Blake senior's uncle Eli Whitney, who changed the face of the cotton industry with the invention of the cotton gin.
Title: Eli Whitney Blake
Content:  Eli Whitney Blake, Sr. (January 27, 1795 – August 18, 1886) was an American inventor, best known for his mortise lock and stone-crushing machine, the latter of which earned him a place into the National Inventors Hall of Fame.
Title: Eli Whitney Museum
Content:  The Eli Whitney museum has exhibits on Whitney and his most famous invention, the cotton gin. Other exhibits cover the historic site and A. C. Gilbert, the inventor and toy maker best known for his invention of the erector set. The museum is an experimental learning workshop for design and specializes in building projects for children blending science and invention. The site is located adjacent to the dam first built by Eli Whitney to power the armory, then raised to its current height by Eli Whitney Blake to provide more power. The museum also features water tables with canal locks and is adjacent to a water reservoir as well as hiking trails. In addition to visitor hours, the museum hosts summer and holiday programs and birthday parties, and is home to the annual Leonardo Challenge, a celebration of improvisational creativity that invites artists and designers from the New Haven, Connecticut area to create uncommon inventions and designs from common objects, culminating in an exhibition of their creative efforts.
Title: Willis R. Whitney
Content:  Willis Rodney Whitney (August 22, 1868 – January 9, 1958) was an American chemist and founder of the research laboratory of the General Electric Company. He is known as the "father of industrial research" in the United States for blending the worlds of research and industry together; which at the time, were two very distinct careers. He is also known for his corrosion theory of iron which he developed after studying at M.I.T. and the University of Leipzig. Whitney was also a professor at M.I.T. for some time before his career transition into research directing. He received many awards, including the Willard Gibbs medal, the Franklin medal, the Perkin medal, the Edison medal, the John Fritz medal, the Chandler medal, and many others. He was an astute believer in researching and experimenting for pleasure and voiced his belief at various science conferences.
Title: Boston Brahmin
Content: Eli Whitney (1765–1825) ; William Collins Whitney (1841–1904) 
Title: William Whitney Christmas
Content:  William Whitney Christmas, M.D. (September 1, 1865 – April 14, 1960) was a physician, pioneer aviator, and supposed con man. He was one of many claimants for an early design of the aileron. He was a vice-president of the General Development Corporation.

Question: who is eli whitney and what did he invent?
Answer: Cotton gin.