Computer software for data storage, namely for computer file systems, computer caches and tape storage; computer software for eliminating redundant data before data storage and communication; computer communication software for network caches; computer communication software for network protocol; computer communication software for the transmission of files, electronic mail, web pages, software and databases; computer search engine software containing index, comparison and retrieval capabilities; data compression software; computer filtration software, namely for detection of unwanted electronic mail and attachments and for the identification of frequently occurring spans of data and data streams; computer utility programs for the purpose of backing up and archiving data; computer utility programs for the purpose of identifying files of similar content in the file system
Electrical and Scientific Apparatus