First the characteristic of VCL is described,then the problems of managing the medical record by this method are mentioned and the absolutions are provided also.

File encryption approach based on virtual disk;

Security enhanced virtual disk encryption system and technology

Through the introduction of virtual disks,the device persistency is achieved in the plug and play e.

A high-performance,low-price alarm host system with virtual keyboard and console PC is designed for the management of the isolated alarm host systems.

The critical part of the new solution is an interface called virtual keyboard which provides stimuli for user′s characters input.

We took advantage of the stroke-comprising characteristics of Chinese characters to simplify the P300 induction interface,and designed the Chinese typing virtual keyboard accordingly.

In this article, the principle and category of virtual harddisk systems for Windows NT/2000 were analyzed, the implementation of a virtual harddisk system was described as well, including some important notes should be paid attention to during the process.