K9 or K-9 most commonly refers to: * K9, the nickname of police dogs and the police dog unit itself * Canine or ''

Canis ''Canis'' is a genus of the Caninae which includes multiple extant taxon, extant species, such as Wolf, wolves, dogs, coyotes, and golden jackals. Species of this genus are distinguished by their moderate to large size, their massive, well-devel ...

'', a genus including dogs, wolves, coyotes, and jackals *

K9 Thunder The K9 Thunder is a South Korean 155 mm self-propelled howitzer designed and developed by the Agency for Defense Development and civil contractors including Dongmyeong Heavy Industries, Kia Heavy Industry, Poongsan Corporation, and Samsung Aer ...

, a 155mm self-propelled artillery used by the Republic of Korea Armed Forces K9 or K-9 may also refer to:

Fictional dogs

* K9 (''Doctor Who''), the name of several robotic canines in the British science fiction television series ''Doctor Who'' * K-9 (''Looney Tunes''), a dog in the ''Looney Tunes'' cartoon series * K9 Murphy, a mechanical dog in the Japanese television series ''Tokusou Sentai Dekaranger''

Computing

* AMD K9, a microprocessor *

K-9 Mail K-9 Mail is free and open source email client for Android. It is designed as an alternative to the stock email clients included with the platform; it supports both POP3 and IMAP protocols and supports IMAP IDLE for real-time notifications. The p ...

, a mail client for the Android operating system * K9 Web Protection, a web content control software * K9Copy, a DVD backup and authoring program for Unix-like operating systems

Entertainment

* ''K-9'' (film), a 1989 American film ** ''K-9'' (film series), a film series consisting of four movies * ''K-9'' (TV series) a British/Australian comedy/adventure series starring the same character as featured in ''Doctor Who'' * K9, a television station serving Boise, Idaho, now known as

KNIN-TV KNIN-TV (channel 9) is a television station licensed to Caldwell, Idaho, United States, serving as the Fox affiliate for the Boise area. It is owned by Gray Television, which maintains a shared services agreement (SSA) with the E. W. Scripp ...

* Sonata in G for Keyboard and Violin, K. 9, a sonata by Wolfgang Amadeus Mozart

Military

* HMAS ''K9'', an Australian submarine *

K-9 (missile) The K-9 ( NATO reporting name AA-4 'Awl') was a short-range air-to-air missile developed by the Soviet Union in the late 1950s. It was designed by MKB Raduga, a division of aircraft maker Mikoyan-Gurevich. The K-9 was also known as the K-155, and ...

, a Soviet short-range air-to-air missile * Kahr K9, a variant of the

Kahr K series The Kahr K series is a series of semi-automatic pistols manufactured by Kahr Arms. The original weapon in the series, the K9, was introduced in 1995 and features a double action only (DAO) trigger mechanism with a Locked breech recoil operated a ...

, a 9×19mm Parabellum semi-automatic pistol manufactured by the American company Kahr Arms *

Pusan East (K-9) Air Base Pusan East (K-9) Air Base was a United States Air Force (USAF) and Republic of Korea Air Force (ROKAF) air base adjacent to the Suyeong River in Haeundae District, Busan, South Korea. It was redeveloped in the 1990s as Centum City, a commercial ...

, an abandoned air base in Busan, South Korea

Automotive

Kia K9 The Kia K9, marketed as the Kia K900 in the United States and Canada and as the Kia Quoris in other export markets, is a full-size luxury sedan manufactured and marketed by Kia, now in its second generation. The K9 was launched in South Korea i ...

, a full-size luxury sedan *

K-9 (Kansas highway) K-9 is a state highway in the U.S. state of Kansas. The highway goes east–west through Kansas. It has its western terminus south of Dresden at an intersection with K-123 and an eastern terminus at its junction with U.S. Route 73 near ...

, a state highway in Kansas, US * BYD K9, a battery electric bus

Other

K9 glass K9 glass, sometimes referred to as K9 crystal, is a variety of optical borosilicate crown glass. The letter "K" is a reference to the German word for "crown" (''Krone'') and the number 9 refers to the lead oxide content of the glass (9%). K9 glas ...