sentences:  SDD's mission was to design the "Office of the future", a new system that would incorporate the best features of the Alto, was easy to use, and could automate many office tasks.The development team was headed by David Liddle, and would eventually grow to more than 200 developers.A good part of the first year was taken up by meetings and planning, the result of which was an extensive and detailed functional specification, internally termed the "Red Book".