surfaces which are inclined at predetermined angles with respect to a rotation shaft installed between a rear side of the evaporator and a front side of the heater core.
A mode of the first variable wall comprises a mode in which a partition wall is formed to separate the air paths for internal and external air into upper and lower portions between the rear side of the evaporator and the front side of the heater core, and a mode in which the air input along the air paths is prevented from being directly supplied to the heater core and simultaneously guiding the supply.
A floor door is installed at the rear side of the heater core and is opened or closed to control the amount of the hot air passingThe OS wars. It is a period of mounting tensions. The empires of Bill Gates and Steve Jobs careen toward an inevitable battle over proprietary software—only one empire can emerge as the purveyor of a standard operating system for millions of users. Gates has formed a powerful alliance with IBM while Jobs tries to maintain the purity of his brand. Their struggle for dominance threatens to engulf the galaxy. Meanwhile, in distant lands, and unbeknownst to the Emperors, open source rebels have begun to gather...

Veterans from computer history, including Andy Hertzfeld , from the original Macintosh team, and acclaimed tech journalist Steven Levy , recount the moments of genius, and tragic flaws, that shaped our technology for decades to come.