英文文法一問英文文法一問英文文法一問

Another suggestion:

Employee may be provided with mobile phone or notebook computer in which lots of business related information can be stored.

首先要討論的是，你句子文法上有錯誤：因為你的闗係子句(relative clause)並沒有主詞。
一般在關係子句中的，in which, of which, with which, where等，我們稱之為關係副詞(relative adverb)，因此你的句子就出了少許問題。
其實你大可用which，而不用in which, of which就可以了：全句
Employees may be provided with mobile phones or notebook computers, which may stored lots of business related information.

希望幫到你！

in which is better