http://www.multinet.no/~jonarne/Hjemmesia/Favorittartister/yazoo/yazoo.jpg

Vince Clarke and Alison Moyet's group Yazoo were marketed in the U.S. as the truncated form "Yaz" in deference to another group called "Yazoo" active in America at the time.  Details about this other "Yazoo" unknown to me.

Clarke took the name "Yazoo" from an old blues label called Yazoo, which in turn was named for the Yazoo River in Mississippi. 
http://www.bluesworld.com/144Yazoo.jpeg
(Yazoo label imprint)

The name change was a nice professional courtesy, but I never liked it.  It was bad enough that "Yaz" could be confused with:

a. Carl Michael "Yaz" Yastrzemski, a left fielder for the Boston Red Sox.
http://www.vintagecardtraders.org/virtual/70topps_super/70topps_super-29.jpg

b. The  Yaz culture, an indo-Iranian Iron Age culture of the second millennium B.C.
http://content.answers.com/main/content/wp/en/thumb/9/99/150px-PazyrikHorseman.JPG

c. Yaz Pistachio, Bobbi Harlow's teenaged niece in Berke Breathed's "Bloom County" comic strip.
http://img.search.com/thumb/0/01/Loosetails_cover.jpg/380px-Loosetails_cover.jpg
(sorry, could find no picture of YP to gank!)

Nor did it help that the group "Yazoo," so short-lived, was still gaining popularity in the U.S. even as Clarke and Moyet parted ways in 1983, while:
a. The sports pressed buzzed with stories of "Yaz" Yastrzemski's retirement in the Fall of '83 after 22 years with the Sox.
b. Russian archeologists were excavating Yaz culture artifacts in 1983.  Uh, nobody noticed this except for some scholars. 
c. Yaz Pistachio appeared in "Bloom County" from June through December, 1983. 

But this is the last straw:
The German pharm co. Schering is advertising it's oral contraceptive brand name "Yaz" (drospirenone and ethinyl estradiol), which was approved in the U.S. in 2006, on television:

http://www.contemporaryobgyn.net/obgyn/data/articlestandard/obgyn/232006/331088/i1_t.jpg


Now it is time for Mute Records to reissue all Yazoo releases under the proper name.  Enough is enough!

http://idata.over-blog.com/0/34/38/73/yazoo.jpg

Here In Canada, Clarke/Moyet released as both Yaz and Yazoo.  The copies I have of 'Upstairs at Erics' and 'You and Me Both' are under the Yaz name, but the 12" and 45rpm single of 'Situation' is as Yazoo

I have the UK version of 'Upstairs at Erics' as Yazoo on CD.  The album sleeve is a cropped version of the North American version

Here In Canada, Clarke/Moyet released as both Yaz and Yazoo.  The copies I have of 'Upstairs at Erics' and 'You and Me Both' are under the Yaz name, but the 12" and 45rpm single of 'Situation' is as Yazoo

I have the UK version of 'Upstairs at Erics' as Yazoo on CD.  The album sleeve is a cropped version of the North American version

Your singles are imports. 
The amazing thing about Yazoo is their staying power.  I wouldn't bother to alleviate confusion about, say, "Spizz Energi"!
It's been 24 years for "You and Me Both" and 25 years for "Upstairs at Eric's" and neither has ever gone out of print. The collection "Only Yazoo" sold impressively as well.  My gripe with that was they left off great B-sides and a UK top 20 hit, "The Other Side of Love," which was on neither studio album, but included '90s House/Techno remixes, which were crummy to start with and proved ephemeral.  The updated version of "Only You" augmented with synth orchestration is superb, though.  They didn't improve on the original (you can't because it's perfect), but they made a terrific alternate mix.  Techno was just dance music.  Yazoo was excellent pop music, which just happened to be electronic, and provide many danceable tracks.

Your singles are imports. 


The original 1982 45 rpm of "Situation" as credited by Yazoo which I have in front of me says it was manufactured and distributed in Canada according to the fine print.  The Yaz name was s'posed to apply for both the US and Canada.  The weird thing is that when 'Situation' charted in Canada, it was listed in the printed chart as Yaz. 

http://img106.imageshack.us/img106/8928/yazsituationmk5.png


My gripe with that was they left off great B-sides and a UK top 20 hit, "The Other Side of Love," which was on neither studio album, but included '90s House/Techno remixes, which were crummy to start with and proved ephemeral. 

I was also disappointed at the non inclusion of that track.  In some ways, I didn't get 'Only Yaz - The Best of Yaz' for that reason alone.  A 12" version of 'The Other Side of Love' appears on the CD version of the UK issue of Upstairs at Eric's

http://www.britsuperstore.com/acatalog/Yazoo_Flavoured_Milk_500ml_52.jpg

The only Yazoo I see these days!