va·de me·cum /ˌvediˈmikəm, ˌvɑdiˈme-/
  隨身物,手冊
  Va·de me·cum  A book or other thing that a person carries with him as a constant companion; a manual; a handbook.
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  vade mecum
       n : a concise reference book providing specific information
           about a subject or location [syn: handbook, enchiridion]