A VSE system file that reflects the software additions, corrections, and deletions that have been made to a given VSE system. This file is accessed by the MSHP component of VSE /Advanced Functions.; 一種虛存擴充操作系統(tǒng)(VSE)的系統(tǒng)文件，反映了對給定的VSE系統(tǒng)曾做過的補充、更改和刪除。利用VSE /AF的維護系統(tǒng)歷史程序(MSHP)可以 訪問該文件。