Note 4. Property, Plant, and Equipment, Net

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

As of September 30, 2007, property, plant, and equipment, net consisted of the following:

USPTO Property, Plant, and Equipment as of September 30, 2007 (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 $255,929 $193,123 $ 62,806 Software SL 3-5  226,315  184,156   42,159 Software in Progress — —   25,104        —   25,104 Furniture SL 5   25,330   11,471   13,859 Equipment SL 3-5   10,883    8,854     2,029  Leasehold Improvements SL 5-20   71,385    12,765    58,620 Total Property, Plant, and Equipment     $614,946 $410,369 $204,577

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