Australian Broadcasting Corporation

The Australian Broadcasting Corporation is the national radio and television broadcaster of Australia.  They were established in 1932 with headquarters in Sydney, New South Wales.  ABC's Lissajous curve logo has been officially in use, with slight modifications, since 1963.  They currently operate 54 local radio stations along with four national networks and an international service, Radio Australia. 
 

WYTZ

"97.5 Y Country" WZTY is licensed to Bridgman in southwest Michigan.  At one time they were simulcast on 103.7 FM WZTY in Hartford, MI near Kalamazoo.
 

WRTH

1430 AM WRTH was an Adult Standards station in St. Louis, Missouri from 1991 to 2005 (with a brief foray into 50s/60s Oldies around 2003.)
 

WOKO AM & FM

The WOKO call letters could be found on the AM dial in Albany, New York from 1931 until 1983 (and briefly again in 1987/88.)  This sticker probably dates to the early 80s near the end of their second attempt at a Country format.

98.9 FM WOKO has been a Country station in Burlington, Vermont since 1990.  A footnote on the Wikipedia page for what is now WOPG says that the WOKO call letters were chosen for this station at the behest of an employee who wished to honor the original WOKO in Albany.

KBTL/World College Radio Day

KBTL "88.1 The Grizz" is the student-run station at Butler Community College in El Dorado, Kansas.  The 400-watt station received their broadcasting license in 2001 and airs a mix of music, talk and sports.  KBTL is a participant in World College Radio Day 2023 which unites hundreds of college radio stations around the world.  Their goal is to raise the profile of these stations and encourage students to participate in campus radio as well as invite listeners who might not normally listen to their local college station.

WGOW

102.3 FM WGOW is a News/Talk station licensed to Soddy-Daisy, Tennessee just north of Chattanooga.
 

KYOK

AM 1590 KYOK was on the air in Houston, Texas from 1954 until 1999.  They were originally owned by two Louisiana businessmen who operated a chain of stations in the southern United States, all of which had "OK" in their call letters and were targeted to African-American listeners.  KYOK's formats over the years included R&B, Urban Contemporary, Gospel, Hip-Hop/Urban and Soul Oldies.  In the early 1990s their programming was simulcast on two FM rimshot signals in Houston.  The KYOK call letters currently exist at 1140 AM now licensed to Conroe, Texas.
 

KSHK

"Shaka 103" KSHK plays Classic Rock on the island of Kaua'i, Hawaii.  This sticker dates to around 2012 when they were located at 103.3 FM and licensed to Kekaha, HI.  In 2014 they moved down a notch to 103.1 FM now licensed to Hanamaulu, HI.