The anti-competitive behaviour was the conversations with Apple regarding collusion to undermine Sun. These conversations spanned email, phone calls and meeting

The anti-competitive behaviour was the conversations with Apple regarding collusion to undermine Sun. These conversations spanned email, phone calls and meetings all within close proximity. The email was the clearest indication of it as it spelt out the "clear plan" on which Microsoft would proceed. As per the email, the phone call (which in itself cannot be proved but more matter is shared later on when Microsoft CFO/Treasurer met with Jobs and other documents came to light).