IBM announced today that it is acquiring Internet Security Systems for $1.3 billion. This is IBM’s third large deal in as many weeks. I wrote about IBM’s acquisitions of FileNet and MRO on August 10th for a total of $2.4 billion – I wouldn’t have guessed they would have made another $1+ billion acquisition so quickly. With the acquisition of ISS, IBM has entered the security market in a big way. I wonder if they have an affinity for companies with three initials (ISS, MRO) – I guess I should abbreviate a bunch of my companies names to see if I can attract some attention.