Notes on the text
1 in the mid 1970s，在20世纪70年代中叶。
3 Mainframe computers were very largeindeed…software. 在这句话中，现在分词短语occupying和employing以及过去分词短语run均作主语mainframe computers的修饰成分。
4 take over，接收，接管。
5 home computer，家用电脑。
6 a then small company，那时候规模尚小的一个公司。
7 dismiss the idea that…，个考虑……这个想法。
8 the Internet, the worldwide system that…，后面的这个短语用来进一步说明名词the Internet，是它的同位语，这种用法在科技类的文章中很常见。
Multiple choice questions
Choose the correct answers to the following questions.
1 In the mid 1970s, computers were ______ .
c.in widespread use
d.not at all common
2 The importance of the Altair was that it ______ .
a.did not need specially-written software to run it
b.put computing power within the reach of ordinary people
c.helped to establish Microsoft DOS as the standard system
d.was widely copied by IBM and other big manufacturers
3 Leon Bagrit foresaw that before long ______ .
a.we would be able to teach computers to think like human beings
b.computers would bring about the development of the Internet
c.computers in hospitals would diagnose illnesses and prescribe treatments
d.computers in commerce would take over many repetitive tasks