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.