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Ahmed III (Ottoman Turkish: احمد ثالث, Aḥmed-i sālis) (30 December 1673 – 1 July 1736) was Sultan of the Ottoman Empire and a son of Sultan Mehmed IV (r. 1648–1687). His mother was Gülnuş Sultan, originally named Evmania Voria, who was an ethnic Greek. He was born at Hacıoğlu Pazarcık, in Dobruja. He succeeded to the throne in 1703 on the abdication of his brother Mustafa II (1695–1703). Nevşehirli Damat İbrahim Pasha and the Sultan's daughter, Fatma Sultan (wife of the former) directed the government from 1718 to 1730, a period referred to as the Tulip Era.
The first days of Ahmed III's reign passed with efforts to appease the janissaries who were completely disciplined. However, he was not effective against the janissaries who made him sultan. Çorlulu Ali Pasha, who Ahmed brought to the Grand Vizier, tried to help him in administrative matters, made new arrangements for the treasury and Sultan. He supported Ahmed in his fight with his rivals.
dBase (also stylized dBASE) was one of the first database management systems for microcomputers and the most successful in its day. The dBase system includes the core database engine, a query system, a forms engine, and a programming language that ties all of these components together. dBase's underlying file format, the .dbf file, is widely used in applications needing a simple format to store structured data.
Originally released as Vulcan for PTDOS in 1978, the CP/M port caught the attention of Ashton-Tate in 1980. They licensed it and re-released it as dBASE II, and later ported it to IBM PC computers running DOS. On the PC platform, in particular, dBase became one of the best-selling software titles for a number of years. A major upgrade was released as dBase III, and ported to a wider variety of platforms, adding UNIX, and VMS. By the mid-1980s, Ashton-Tate was one of the "big three" software publishers in the early business software market, the others being Lotus Development and WordPerfect.
Starting in the mid-1980s, several companies produced their own variations on the dBase product and especially the dBase programming language. These included FoxBASE+ (later renamed FoxPro), Clipper, and other so-called xBase products. Many of these were technically stronger than dBase, but could not push it aside in the market. This changed with the poor reception of dBase IV, whose design and stability were so lacking that many users switched to other products. At the same time, database products increasingly used the IBM-invented SQL (Structured Query Language). Another factor was user adoption of Microsoft Windows on desktop computers. The shift toward SQL and Windows put pressure on the makers of xBase products to invest in major redesign to provide new capabilities.
In the early 1990s, xBase products constituted the leading database platform for implementing business applications. The size and impact of the xBase market did not go unnoticed, and within one year, the three top xBase firms were acquired by larger software companies:
By the opening decade of the 21st century, most of the original xBase products had faded from prominence and many disappeared entirely. Products known as dBase still exist, owned by dBase LLC.