The document provides an overview of the history and evolution of computers from the 1600s to present day. It discusses early mechanical calculating devices, the development of programmable computers using vacuum tubes in the 1940s-1950s, the transition to transistors in the 1960s which made computers smaller and faster, the introduction of integrated circuits and microprocessors in the 1970s-1980s, and advances like laptops, internet connectivity, and increased processing power from the late 1980s to today. Input and processing components of the basic computer system are also outlined.
This document discusses and compares various sources of renewable and non-renewable energy. It outlines the benefits of renewable sources like solar, wind, hydroelectric, geothermal and biomass energy over fossil fuels. While renewable sources have upfront costs, they have lower long-term costs, cause less environmental damage and are sustainable. Fossil fuels are rapidly depleting and their extraction and use produces significant pollution and greenhouse gases. Overall, the document argues that renewable sources are a better option for meeting energy needs due to their economic and environmental benefits.
The document provides an overview of the history and evolution of computers from the 1600s to present day. It discusses early mechanical calculating devices, the development of programmable computers using vacuum tubes in the 1940s-1950s, the transition to transistors in the 1960s which made computers smaller and faster, the introduction of integrated circuits and microprocessors in the 1970s-1980s, and advances like laptops, internet connectivity, and increased processing power from the late 1980s to today. Input and processing components of the basic computer system are also outlined.
This document discusses and compares various sources of renewable and non-renewable energy. It outlines the benefits of renewable sources like solar, wind, hydroelectric, geothermal and biomass energy over fossil fuels. While renewable sources have upfront costs, they have lower long-term costs, cause less environmental damage and are sustainable. Fossil fuels are rapidly depleting and their extraction and use produces significant pollution and greenhouse gases. Overall, the document argues that renewable sources are a better option for meeting energy needs due to their economic and environmental benefits.
9. "Con trai, tại sao con không tiến về phía trước"Con trai, tại sao con không tiến về phía trước
và hạnh phúc sẽ theo sau con".và hạnh phúc sẽ theo sau con".
10. Vậy chúng ta tại sao
cứ phải đi tìm cho mình
hạnh phúc nhỉ?
