The technical department of a large company has a number of PCs to lend out to employees in case of need(for example, when their PC in service or they are waiting to buy a new one).
一家大公司的技术部门有许多个人电脑借给员工以备不时之需(例如,当他们的个人电脑在使用中或他们正在等待购买一台新的电脑时)。
The list of all the PCs used for this purpose is contained in a text file parkPC.txt, which has on each line the unique identification code of a PC(*4-character alphanumeric). The PCs are not listed in any specific order.