Motorola, which developes the PowerPC G4 used in Apple systems, today reported a fourth-quarter operating loss of US$90 million, compared to a profit of $362 million in the year-ago quarter. Including one-time charges, the company posted a $1.2 billion loss for the quarter, mostly due to restructuring costs. Revenue for the quarter dipped 25 percent from the year-ago period to $7.3 billion. For the year, Motorola reported a pre-tax loss of $4.5 billion ($3.3 billion after-tax) as sales declined from $37.3 billion in 2000 to $30.0 billion in 2001. Looking ahead, Motorola sees itself operating in the red for two more quarters, but turning a profit in the second half of 2002 that will be sufficient enough to make the coming year as a whole profitable.