Because supplies such as envelopes, shipping labels, tape, etc. relate to the tasks associated with a mail room, these two items could logically be put together.

因为办公用品比如信封，邮递标签，胶带等都与收发室有关，这样两种建议逻辑上可以合并为一个。

youdao

Avoid using your work phones, E-mail, supplies, copiers or other equipment to make appointments or prepare resumes or letters.

无论你是想和人预约还是准备简历或求职信，千万不要使用公司的电话和电子邮件，以及办公用品、复印机或其它设备。

youdao

Her parents are entrepreneurs who became millionaires from a mail-order party-supplies business, which has prompted some ridicule in a society where snobbishness can still be a prized trait.

她的父母是经营儿童玩具邮购业务的企业家，这引来社会上一些嘲笑，称势利仍然被看做是重要的特征。

youdao

Back in 1977 I was doing a lot of running, and had already started a mail order business, selling office supplies by mail order catalog.

FORBES: Richard Thalheimer's Entrepreneurship Advice

Before terrorists strike, they must enter the country, receive funds, case their targets, buy supplies, and send phone and e-mail messages.

CENTERFORSECURITYPOLICY: Balancing security and privacy during wartime