Yes
Google: usps international mail manual
http://pe.usps.com/text/imm/welcome.htm123.63 Documents and Merchandise
In Exhibit 123.61, the "Type of Item" column has several references to "documents." For this purpose, "documents" refers only to printed documents, not to electronic storage media or devices such as CDs, DVDs, or flash drives. Examples of documents include the following:
a.Audit and business records.
b.Personal correspondence.
c.Circulars.
d.Pamphlets.
e.Advertisements.
f.Written instruments not intended to be resold.
g.Money orders, checks, and similar items that cannot be negotiated or converted into cash without forgery.
Examples of items that do not qualify as documents â€" rather, they are considered merchandise, so the sender is required to apply a customs declaration form and declare a value â€" include the following:
a.CDs, DVDs, flash drives, video and cassette tapes, and other electronic storage media â€" regardless if they are blank or if they contain electronic documents or other prerecorded media.
b.Artwork.
c.Collector or antique document items.
d.Books.
e.Periodicals.
f.Printed music.
g.Printed educational or test material.
h.Player piano rolls.
i.Engineering drawings.
j.Blueprints.
k.Film.
l.Negatives.
m.X-rays.
n.Separation negatives.
o.Photographs.
-----Burton
50+ year / Life / Emeritus
ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, EveryCountry (online) coin club
Owned by three cats and a wife of 40+ years (joined 1983)
Author: 3rd Edition of the Sample Slabs book,
https://www.sampleslabs.info/