Cliff Stoll was an astronomer turned systems manager at Lawrence Berkeley Lab when a 75-cent accounting error alerted him to the presence of an unauthorized user on his system ...

The account of Stoll stalking a methodical "hacker" who was prowling the nation's computer networks to gain unauthorized access to American files.

The account of Stoll stalking a methodical "hacker" who was prowling the nation's computer networks to gain unauthorized access to American files.

The account of Stoll stalking a methodical "hacker" who was prowling the nation's computer networks to gain unauthorized access to American files.

The account of Stoll stalking a methodical "hacker" who was prowling the nation's computer networks to gain unauthorized access to American files.

The account of Stoll stalking a methodical "hacker" who was prowling the nation's computer networks to gain unauthorized access to American files.