From ABBYY USA Software House:
Lingvo x5 represents the next generation of dictionary software. Combining reliable content, powerful word lookup, and intuitive software, Lingvo x5 English-Russian makes it easier than ever to learn and master both languages. With instant translation, simply mouse over a word to get definitions and translations within applications, web browsers, emails, documents, PDFs, images, and more. The Custom Dictionary feature allows users to create custom dictionaries for preserving terminology integrity while translating documents. Lingvo x5 English-Russian compiles multiple dictionaries to ensure accuracy and relevance.