The new hotshoe is mechanically incompatible with the i ISO hotshoe, but electrically backwards compatible.
On 12 September 2012, Sony introduced a new 21 3-pin metal-based hotshoe with mechanical quick locking mechanism, called Multi Interface Shoe.
At first sight it resembles a standard ISO 518 hotshoe with just the middle contact and chassis and without any vendor-specific extra contacts, but additional contacts are hidden under the front of the hotshoe.
i ISO (intelligent ISO) flash shoe (aka "reversed" hotshoe) is the unofficial name for the proprietary accessory flash attachment and control interface used on Minolta cameras since the i-series introduced in 1988, and subsequently Konica Minolta and later Sony α DSLRs and NEX-7 up to 2012. In order to speed up and enhance attachment, detachment and latching, it departs from the conventional circa-1913 mechanical design that is now standardized as ISO 506 By 1940's, with the addition of the central contact, the design became commonly used for attaching and triggering accessory flashes and known as the "hot-shoe".
Prior to 1988, Minolta has used that familiar, common hot-shoe design, adding, just like the other makers, its own proprietary contacts for enhanced control.
The international standard date notation is where YYYY is the year in the usual Gregorian calendar, MM is the month of the year between 01 (January) and 12 (December), and DD is the day of the month between 01 and 31.
For example, the fourth day of February in the year 1995 is written in the standard notation as Other commonly used notations are e.g.
In addition, these formats have several important advantages for computer usage compared to other traditional date and time notations.
The time notation described here is already the de-facto standard in almost all countries and the date notation is becoming increasingly popular.
For decades quality management professionals have been attempting to reduce variation introduced by error including human error, to improve consistency and control outputs.