Networking changed all that. It allowed someone to hack away at yoursoftware from somewhere else, mostly undetected. But it also meantthat more people were using computers, so there was more demand forsoftware. That led to more competition. Software vendors codedfrantically - under the insecure pedagogy - to outwit competitors withmore features sooner. That led to what one software developer called"featureitis." Inflammation of the features.

Now, features make software do something, but they don't stop it fromunwittingly doing something else at the same time. E-mail attachments,for example, are a feature. But e-mail attachments help spreadviruses. That is an unintended consequence - and the more features, themore unintended consequences.