Below is Semi’s April 2007 Book-to-Bill Report. The three-month average of worldwide bookings in April 2007 was $1.60 billion. The bookings figure is over 12% higher than the final March 2007 level of $1.42 billion and even with the $1.60 billion in orders posted in April 2006. The monthly Book-to-Bill Report tracks billings and bookings worldwide of North American-headquartered manufacturers of equipment used to manufacture semiconductor devices, not billings and bookings of the chips themselves. The book-to-bill is a ratio of three-month moving averages of worldwide bookings and billings for North American-based semiconductor equipment manufacturers. Billings and bookings figures are in millions of U.S. dollars.