libboost-thread1.33.1 1.33.1-2 (i386 binary) in ubuntu dapper

portable C++ multi-threading
 Part of the Boost C++ Libraries collection.
 .
 Toolkit for writing C++ programs that execute as multiple,
 asynchronous, independent, threads-of-execution. Each thread has its
 own machine state including program instruction counter and
 registers.
 .
  Homepage: http://www.boost.org/libs/thread/