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Catalog IT-Times

***Metaverse*ACM Turing Award*Banking and financial services*IDE*IT security and data protection policy*Government3D-DruckAndroidAR/VRArtificial IntelligenceBig DataBlockchainCAD/CAE/CAM/EDA/PDM/PLMChat/Video Conferencing/PhoneCloud ComputingCMSCNCComputer Algebra System and MathematicsCRM/EAM/ERP/SRM/SCM/HCM/QM/XM/WFMCross platformData analysisDatabase management systemsPrinter/Photocopier/ScannereBookeCommercePower Engineering SoftwareDriver assistance systemsFPGAGames industryGaming ClubGraphics software and graphics tabletGraphics card/Video cardSemiconductor technologyHPCICIndustrial RobotInstant Messaging und VoIPInternet of ThingsLinux/UnixMainframeMCU MedicineMicrosoft WindowsMobile Networks Modernization of agricultureMotherboardMusic productionOperating SystemPayment SystemPCI-SIGPLC/DCS/FCS/SCADA/MES Precision Instrument/Medical Equipment/Research EquipmentProduction Engineering/Manufacturing TechnologiesProfessional media softwareProgramming language and frameworkQuantum ComputingRoot name serverSensorSmart phoneSocial networkStreaming MediaStream processorSearch Engine TCP/IP ProtocolsTuring AwardProcessing Units - CPU, GPU, APU, TPU, VPU, FPGA, QPU, IPU, PICVersion controlDistributed systemVirtualization
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Vodafone Group
沃达丰集团
 
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Catalog IT-Times Games industry
Catalog Games
Void Bastards

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Catalog IT-Times
VPN
虚拟专用网络
Virtual Private Network

虚拟专用网络可以实现不同网络的组件和资源之间的相互连接。虚拟专用网络能够利用Internet或其它公共互联网络的基础设施为用户创建隧道，并提供与专用网络一样的安全和功能保障。

 

（图1）

虚 拟专用网络允许远程通讯方，销售人员或企业分支机构使用Internet等公共互联网络的路由基础设施以安全的方式与位于企业局域网端的企业服务器建立连 接。虚拟专用网络对用户端透明，用户好象使用一条专用线路在客户计算机和企业服务器之间建立点对点连接，进行数据的传输。

　　虚拟专用网络技术同样支持企业通过Internet等公共互联网络与分支机构或其它公司建立连接，进行安全的通讯。这种跨越Internet建立的VPN连接逻辑上等同于两地之间使用广域网建立的连接。

　　虽然VPN通讯建立在公共互联网络的基础上，但是用户在使用VPN时感觉如同在使用专用网络进行通讯，所以得名虚拟专用网络。

　　使用VPN技术可以解决在当今远程通讯量日益增大，企业全球运作广泛分布的情况下，员工需要访问中央资源，企业相互之间必须进行及时和有效的通讯的问题。

　　如果希望企业员工无论身处何地都能够与企业计算资源建立连接，企业必须采用一个可靠性高、扩展性强的远程访问解决方案。一般的，企业有如下选择：

1.管理信息系统（MIS）部门驱动方案。建立一个内部的MIS部门专门负责购买，安装和维护企业modem池和专用网络基础设施。

2.增值网络（VAN）方案。企业雇佣一个外部公司负责购买，安装和维护modem池和远程通讯网络基础设施。

　　从费用，可靠性，管理和便于连接等几方面来看，这两种方案都不能最大程度的满足企业对网络安全性或扩展性的要求。因此，选择一种基于Internet技术的廉价方案取代企业花费在modem池和专用网络基础设施上的投资就显得极为重要。

(aus www.linkwan.com/gb/routertech/routerbase/vpn/vpn1.htm) 

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Catalog IT-Times Processing Units - CPU, GPU, APU, TPU, VPU, FPGA, QPU, IPU, PIC
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VPU
視覺處理單元 视觉处理单元
Vision processing unit, VPU

视觉处理单元（VPU）是一类新兴的微处理器；它是一种特殊类型的人工智能加速器，旨在加速机器视觉任务。Eine Vision Processing Unit (VPU) ist eine neue Klasse von Mikroprozessoren; es handelt sich dabei um eine spezielle Art von KI-Beschleuniger, der für die Beschleunigung von Bildverarbeitungsaufgaben konzipiert ist.

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Catalog IT-Times Mainframe
VSAM - Virtual Storage Access Method
虚拟存储访问方法
Virtual Storage Access Method (VSAM, „Methode für Zugriff auf virtuellen Speicher“) ist eine Zugriffsmethode auf Dateien, die auf IBM-Großrechnersystemen seit den 1970er Jahren verwendet wird. VSAM ist weit verbreitet unter den Betriebssystemen z/OS und z/VSE. KSDS ESDS RRDS LDS

VSAM： Virtual storage access method 虚拟存储访问方法是IBM的磁盘文件存储访问方法， 首先使用在0S/VS2操作系统中，然后使用在多虚拟存储架构，现在在z/OS。 作为一个面向记录的文件系统，VSAM由四个数据集组成。关键字顺序数据集KSDS, 关联记录数据集RRDS， 实体顺序数据集ESDS和线性数据集LDS。 KSDS,RRDS和ESDS由记录组成， 而LDS只包含无固定记录结构的字节流。

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Catalog IT-Times Mainframe
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VTAM,Virtual Telecommunications Access Method
虚拟通信接入法
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Catalog IT-Times Programming language and framework
Vue
Vue.js

 

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vxml
语音扩展标记语言
voice extensible markup language
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WABCO Holdings
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Wacom
和冠
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Walt Disney Company
华特迪士尼公司/The Walt Disney Company
1923
 
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Catalog IT-Times
WAN
广域网，指地理上跨越较大范围的跨地区网
Wide area network
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