# A.4.光盘 可从多家在线零售商处购买 FreeBSD 的光盘： * FreeBSD Mall, Inc. 1164 Claremont Dr Brentwood, CA 94513 USA Phone: +1 925 240-6652 Fax: +1 925 674-0821 Email: Website: [https://www.freebsdmall.com](https://www.freebsdmall.com/) * Getlinux Website: * Dr. Hinner EDV Schäftlarnstr. 10 // 4. Stock D-81371 München Germany Phone: +49 171 417 544 6 Email: Website: --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://book.bsdcn.org/hanbook/fu-lu-a.-huo-qu-freebsd/a.4.cd-he-dvd-tao-zhuang.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.