Cyproof’s flagship product ErrNET is a Web-based product that checks documents for acceptable use of English in formal writing. Developed in collaboration with professional editors and publishers, ErrNET checks for errors in grammar, punctuation, style, and spelling. The spellchecker includes over one million terms, including life, physical, and applied sciences terms. A large portion of the ErrNET database includes errors, identified by editors, from papers submitted to professional journals. Thus, using ErrNET is like having a professional editor proofread your work. Use ErrNET to proofread your research reports, grant proposals, review articles, letters, presentations, dissertations, theses, brochures, and books. ErrNET is a fast, cost-effective program that will improve your writing and your chances of publication. Please visit www.errnet.net for more information and/or to check a document.