I graduated from design schematics, with open protel99 se.

protel
......\Backup of AD7810.Lib
......\Backup of BACKUP~1.SCH
......\Backup of BACKUP~2.SCH
......\Backup of HD7279.Lib
......\Backup of ISD1420.Lib
......\Backup of LM386.Lib
......\Backup of SENSOR.Lib
......\Backup of yuyin.Sch
......\Backup of yuyinbaowen.Sch
......\Backup of 瓦斯检测.Sch
......\Backup of 电子密码锁.Sch
......\Backup of 语音保温.Sch
......\Backup of 超声.Sch
......\BACKUP~1.Bkp
......\BACKUP~1.DDB
......\BACKUP~11.Bkp
......\BACKUP~11.DDB
......\BACKUP~12.Bkp
......\BACKUP~12.DDB
......\BACKUP~21.Bkp
......\BACKUP~21.DDB
......\History
......\.......\yuyin.~(1).PrjPCB
......\.......\yuyin.~(1).SchDoc
......\Previous Backup of BACKUP~1.SCH
......\Previous Backup of SENSOR.Lib
......\Previous Backup of yuyin.Sch
......\Previous Backup of yuyinbaowen.Sch
......\Previous Backup of 瓦斯检测.Sch
......\Previous Backup of 电子密码锁.Sch
......\Previous Backup of 语音保温.Sch
......\Previous Backup of 超声.Sch
......\protel99
......\........\2008116217580912
......\........\................\xialiu.IntLib
......\........\MyInt_Lib
......\........\.........\MyInt_Lib
......\........\.........\.........\78稳压块.SCHLIB
......\........\.........\.........\CD4000系列IC.SCHLIB
......\........\.........\.........\History
......\........\.........\.........\Miscellaneous Connectors.PcbLib
......\........\.........\.........\Miscellaneous Devices.SCHLIB
......\........\.........\.........\MyInt_Lib.LIBPKG
......\........\.........\.........\TTL74系列IC.SCHLIB
......\........\.........\.........\二极管.SCHLIB
......\........\.........\.........\单片机及相关.SCHLIB
......\........\.........\.........\场效应管及可控硅.SCHLIB
......\........\.........\.........\声亮元件.SCHLIB
......\........\.........\.........\常用元件封装.PCBLIB
......\........\.........\.........\常用元件封裝庫(pcb).PCBLIB
......\........\.........\.........\常用元件库.SCHLIB
......\........\.........\.........\开关.SCHLIB
......\........\.........\.........\感应元件.SCHLIB
......\........\.........\.........\插件.SCHLIB
......\........\.........\.........\数字符号.SCHLIB
......\........\.........\.........\数字集成电路1.SCHLIB
......\........\.........\.........\模拟符号.SCHLIB
......\........\.........\.........\模拟集成电路.SCHLIB
......\........\.........\.........\电容.SCHLIB
......\........\.........\.........\电池及电源.SCHLIB
......\........\.........\.........\电阻.SCHLIB
......\........\.........\.........\继电器类元件.SCHLIB
......\........\.........\MyInt_Lib.IntLib
......\........\.........\MyInt_Lib1
......\........\.........\..........\78稳压块.SCHLIB
......\........\.........\..........\CD4000系列IC.SCHLIB
......\........\.........\..........\History
......\........\.........\..........\Miscellaneous Connectors.PcbLib
......\........\.........\..........\Miscellaneous Devices.SCHLIB
......\........\.........\..........\MyInt_Lib.LIBPKG
......\........\.........\..........\TTL74系列IC.SCHLIB
......\........\.........\..........\二极管.SCHLIB
......\........\.........\..........\单片机及相关.SCHLIB
......\........\.........\..........\场效应管及可控硅.SCHLIB
......\........\.........\..........\声亮元件.SCHLIB
......\........\.........\..........\常用元件封装.PCBLIB
......\........\.........\..........\常用元件封裝庫(pcb).PCBLIB
......\........\.........\..........\常用元件库.SCHLIB
......\........\.........\..........\开关.SCHLIB
......\........\.........\..........\感应元件.SCHLIB
......\........\.........\..........\插件.SCHLIB
......\........\.........\..........\数字符号.SCHLIB
......\........\.........\..........\数字集成电路1.SCHLIB
......\........\.........\..........\模拟符号.SCHLIB
......\........\.........\..........\模拟集成电路.SCHLIB
......\........\.........\..........\电容.SCHLIB
......\........\.........\..........\电池及电源.SCHLIB
......\........\.........\..........\电阻.SCHLIB
......\........\.........\..........\继电器类元件.SCHLIB
......\Yuyin.Bkp
......\yuyin.PrjPCB
......\yuyin.SchDoc
......\yuyinbaowen.Bkp
......\论文原理图.Bkp
......\论文原理图.ddb

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