Silicon Valley of Turkey

Diliskelesi is a neighbourhood of the municipality and district of Dilovası, Kocaeli Province, Turkey. Its population is 10,910 (2022). It is a port on the north side of the Gulf of İzmit.

TEV İnanç Türkeş High School for Gifted Students (Turkish: TEV İnanç Türkeş Özel Lisesi) is an independent private co-educational boarding school for the gifted and talented in Turkey.

Diliskelesi railway station was a railway station in Diliskelesi, Turkey on the Istanbul-Ankara railway. It was located just southwest of Dilovası, in the southern part of the Diliskelesi in the industrialized port area. The station was a stop on the Adapazarı Express train service; 11 daily eastbound trains and 13 daily westbound trains stopped at Diliskelesi. The station was opened in 1975, when the Turkish State Railways double-tracked the railway from Gebze to Arifiye. Diliskelesi station closed on 1 February 2012 and the platforms were demolished shortly after.

Dilovası is a municipality and district of Kocaeli Province, Turkey. Its area is 125 km2, and its population is 53,416 (2022). The district Dilovası was created in 2008 from part of the district of Gebze, along with the districts Darıca and Çayırova. The mayor is Hamza Şayir (AKP).

The Osmangazi Bridge (Turkish: Osmangazi Köprüsü) is a suspension bridge spanning the Gulf of İzmit at its narrowest point, 2,620 m (8,600 ft). The bridge links the Turkish city of Gebze to the Yalova Province and carries the O-5 motorway across the gulf. The bridge was opened on 1 July 2016 to become the then-longest suspension bridge in Turkey and the fourth-longest (seventh-longest as of 2023) suspension bridge in the world by the length of its central span. The length of the bridge was surpassed by the Çanakkale 1915 Bridge across the Dardanelles strait, which became the longest suspension bridge in the world when it was opened on 18 March 2022.

Libyssa (Ancient Greek: Λίβυσσα) or Libysa (Λίβισσα), was a town on the north coast of the Sinus Astacenus in ancient Bithynia, on the road from Nicaea to Chalcedon. It was celebrated in antiquity as the place containing the tomb of the Carthaginian general Hannibal. In Pliny's time the town no longer existed, but the spot was noticed only because of the tumulus of Hannibal. The site of ancient Libyssa is located within the modern district of Gebze in Kocaeli Province, at the coast of the Gulf of İzmit, near the city of İzmit (ancient Nicomedia) in northwestern Anatolia, Turkey. Hannibal's monumental tomb in Gebze, Kocaeli, Turkey. Atatürk, the founding father of the Republic of Turkey, revered and admired Hannibal so much he honored him with a symbolic tomb close to where Hannibal had died.

Altıntel Port ( Altıntel Tank ve Terminal İşletmeleri A.Ş.) is a tank terminal and port located in Kocaeli/GEBZE, Dilovası OSB Organized Industrial Zone of Turkey. It was established in 1987 for the storage of liquid chemical materials. Its primary customer is Arkem Chemicals, who started renting storage tanks in 1990's and took over the company in 2008.

Hersek headland (Turkish: Hersek burnu) is a headland in Turkey.

Sefine Shipyard (Turkish: Sefine Tersanesi) is located in Yalova Province, Turkey. It builds a wide variety of ships including tugboats, fireboats, passenger/car ferries and well boats.

The TÜBİTAK Marmara Research Center (Turkish: TÜBİTAK Marmara Araştırma Merkezi), shortly TÜBİTAK MAM, is a Turkish scientific and technological center carrying out research projects through its subordinate institutes on basic and applied science fields in the area of industrial needs to contribute to the increase of the global competitive power of the country. It was established in 1972 by the Scientific and Technological Research Council of Turkey (Turkish: Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK) in Gebze, Kocaeli Province bringing a number of research units of TÜBİTAK formed in the past under one umbrella. The center is currently headed by Prof. Dr. İbrahim Dinçer.

The TÜBİTAK Informatics and Information Security Research Center (Turkish: TÜBİTAK Bilişim ve Bilgi Güvenliği İleri Teknolojiler Araştırma Merkezi), shortly TÜBİTAK BİLGEM, is a Turkish scientific and technological center carrying out research projects through its subordinate institutes on various fields of informatics. It was established in 2010 by the Scientific and Technological Research Council of Turkey (Turkish: Türkiye Bilimsel ve Teknolojik Araştırma Kurumu, TÜBİTAK) in Gebze, Kocaeli Province as an umbrella institution of the existing Information Technologies Institute (BTE) and National Research Institute of Electronics and Cryptology (UEKAE) following their transfer from the TÜBİTAK Marmara Research Center.

The National Research Institute of Electronics and Cryptology of Turkey (Turkish: Ulusal Elektronik ve Kriptoloji Araştırma Enstitüsü), shortly UEKAE, is a national scientific organization with the aim of developing advanced technologies for information security. UEKAE is the most prominent and also the founder (first) institute of the TÜBİTAK. The institute was founded by Yılmaz Tokad, professor at ITU (Istanbul Technical University), and four researchers under his supervision in the building of engineering at METU (Middle East Technical University)in 1972, with the name Electronic Research Unit. In 1995 the institute's name has become National Research Institute of Electronics and Cryptology and moved to Gebze, Kocaeli.