Mark Greenberg

Ascendum Solutions LLC provides information technology services. Its services include product engineering, content collaboration and search, quality assurance, on demand and CenterGrid. The firm serves the retail, hi-tech, healthcare and financial services industries. The company is headquartered in Blue Ash, OH.

ED MAP, Inc. provides online education support services. It offers eBooks, custom materials, print textbooks, and educational supplies. ED MAP was founded in 2003 by Michael Mark and Kerry Stoessel Pigman and is headquartered in Nelsonville, OH.

Cengage Learning, Inc. provides educational technology solutions. It offers personalized services and course driven digital solutions for the higher education and K-12, professional, and library markets. The firm's brands include Brooks, Cole, Course Technology, Delmar, Gale, Heinle, South Western, and Wadsworth. The company is headquartered in Boston, MA.

HarperCollins Publishers LLC publishes books and periodicals. It offers literature books, such as commercial fiction, business books, children's, cookbooks, mystery, romance, reference, religious and spiritual books. The company was founded by James Harper and John Harper in 1817 and is headquartered in New York, NY.

Part of WMB Holdings, Inc., The Prentice-Hall Corp. Systems, Inc. is a company that provides legal services. The company is based in Wilmington, DE.

Part of Tetsujin Holdings, Inc., Excelsior Co., Ltd. is a Japanese company that engages in the development, conversion, and distribution of ring tones and karaoke music. The company is based in Tokyo, Japan. Excelsior Co. was acquired by Tetsujin Holdings, Inc. on November 01, 2005 for $1.04 million.

The Ogdensburg Chamber of Commerce operates as a chamber of commerce. The private company is based in Ogdensburg, NY and has subsidiaries in the United States.

Part of S&P Global, Inc., Mayfield Publishing Co. develops textbooks and other educational material for the college market. The company is based in Mountain View, CA. Mayfield Publishing was acquired by S&P Global, Inc. on January 03, 2001.

The Rowman & Littlefield Publishing Group, Inc. provides book publishing services. The firm specializes in academic publishing in the humanities and social sciences, publishing government and official data and educational publishing. The company was founded by Raymond D. Fellers and Stanley D. Plotnick in 1975 and is headquartered in Lanham, MD.