Increasingly, technology companies -- including many that traditionally have sold computer-related equipment -- are investing heavily in software. Here are several examples. Intel (INTC): The Santa Clara chipmaker has bought 14 software companies and added thousands of software specialists to its ranks since 2004. Cisco Systems (CSCO): Nine of the past 10 companies snapped up by the San Jose computer networking giant have been software firms and it has vowed to double its $6 billion in annual software revenue over the next three to five years. Hewlett-Packard (HPQ): Known primarily for its printer and personal computer products, the Palo Alto corporation has bought a number of software companies in recent years, including Autonomy, for which it now admits it paid more than $5 billion too much. Dell: Hoping to revitalize its business, the Texas computer maker also has been acquiring software companies and it announced in February the creation of a software division to "help catalyze our transformation."