Initially, the volume of large and expensive digital computer is mainly used for the implementation of scientific computing, especially in military issues. Such as the ENIAC the first one to be used as artillery trajectory calculation and design of the hydrogen bomb for calculating the neutron-density cross-section (now a number of supercomputer simulations of nuclear tests still play a huge role). Australia's first stored-program design of a computer CSIR Mk I type responsible for the hydropower projects in the catchment area of the rain to assess the situation. There are also be used to decrypt, such as the British "Colossus" programmable computer. Excluding these early scientific or military applications, the computer in other areas, the promotion has been rapid. From the outset, stored-program computer is closely linked with the commercial solution to the problem. As early as the first IBM computer before the birth of Taiwan, the United Kingdom J. Lyons, etc. for design and manufacture of the LEO to carry out asset management or cater to other commercial uses. Due to continuous size and cost control, the computer began to spread within a smaller organization. Coupled with the 20th century, the invention of the microprocessor 70's, cheap computer becomes a reality. With the increasing popularity of computers and computer access to virtually all industries, play an important role. It has become a normal operation in today's society can be an indispensable tool, the computer modern life, occupy an important place, people's dependence on the computer so high, I really can not imagine life without computers will become what is look.
起初，体积庞大而价格昂贵的数字计算机主要是用做执行科学计算，特别是军用课题。如ENIAC最早就是被用作火炮弹道计算和设计氢弹时计算断面中子密度的（如今许多超级计算机仍然在模拟核试验方面发挥着巨大作用）。澳大利亚设计的首台存储程序计算机CSIR Mk I型负责对水电工程中的集水地带的降雨情形进行评估。还有一些被用于解密，比如英国的“巨像”可编程计算机。除去这些早年的科学或军工应用，计算机在其他领域的推广亦十分迅速。从一开始，存储程序计算机就与商业问题的解决息息相关。早在IBM的第一台商用计算机诞生之前，英国J. Lyons等就设计制造了LEO以进行资产管理或迎合其他商业用途。由于持续的体积与成本控制，计算机开始向更小型的组织内普及。加之20世纪70年代微处理器的发明，廉价计算机成为了现实。 随着电脑越来越普及，电脑几乎进入了所有的行业，扮演着举足轻重的角色。它已经成为当今社会得以正常运行不可缺少的工具，电脑在现代人的生活中占据着如此重要的地位，人们对电脑的依赖性如此之高，真不敢想象，没有了电脑生活会变成什么样子。