Note 4. Property, Plant, and Equipment, Net

As of September 30, 2009, property, plant, and equipment, net consisted of the following:

USPTO Property, Plant, and Equipment as of September 30, 2009 (Dollars in Thousands) Classes of Property, Plant, and Equipment Depreciation/ Amortization Method Service Life (Years) Acquisition Value Accumulated Depreciation/ Amortization Net Book Value IT Equipment SL 3-5 $284,681 $235,850 $ 48,831 Software SL 3-5  271,084  221,858   49,226 Software in Progress — —   25,771        —   25,771 Furniture SL 5   28,315   19,931    8,384 Equipment SL 3-5   13,730   11,497     2,233  Leasehold Improvements SL 5-20   94,923    23,566    71,357 Total Property, Plant, and Equipment     $718,504 $512,702 $205,802

As of September 30, 2008, property, plant, and equipment, net consisted of the following:

USPTO Property, Plant, and Equipment as of September 30, 2008 (Dollars in Thousands) Classes of Property, Plant, and Equipment Depreciation/ Amortization Method Service Life (Years) Acquisition Value Accumulated Depreciation/ Amortization Net Book Value IT Equipment SL 3-5 $255,101 $213,033 $ 42,068 Software SL 3-5  238,172  199,602   38,570 Software in Progress — —   46,000        —   46,000 Furniture SL 5   26,803   15,702   11,101 Equipment SL 3-5   11,873   10,144     1,729  Leasehold Improvements SL 5-20   83,065    18,349    64,716 Total Property, Plant, and Equipment     $661,014 $456,830 $204,184

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