The Model 750 was in 1993 aboard the space shuttle Endeavour used. Since then, a total of 54 ThinkPads at various space shuttle missions aboard the space shuttles, most models of the 755er and 760er series. Also on the Russian space station MIR 1999 ThinkPads have been used since February, including the 750 and 770er series. ThinkPads are the only notebooks that for long-term missions aboard the ISS (International Space Station) are certified. In 2003, the A31p replaced the hitherto used in manned space flight earlier ThinkPad models of seven hundred series. Since 2010, in addition to the A31p some T61p on board.