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Maximum flash sync speed. The maximum flash sync speed is the fastest shutter speed at which the entire image sensor can be illuminated by flash pulse. Most modern digital SLR cameras have maximum flash sync speed of ~1/250 of a second. A few camera models (e.g. Nikon D70(s), D50) have maximum flash sync speed as high as 1/500s. This duration is the upper limit of the flash pulse duration.
In the modern era, the concept of Data Entry Speed has become more complicated. The introduction of 10-key pads on keyboards (also known as Numeric Keypads) have split numeric data entry from text data entry. Numeric data entry has also created a separate metric for measuring Data Entry Speed: Keystrokes per hour (KPH). Numeric data entry using a 10-Key Pad is generally expected to be much faster, as no thought has to be put into the meaning or formatting of the text. Competitive speeds for numeric data entry are generally around 10,000 KPH, often as high as 12,000 KPH.