Single-window system Single-window system The single-window system is a trade facilitation idea. As such, the implementation of a single window system enables international (cross-border) traders to submit regulatory documents at a single location and/or single entity. Such documents are typically customs declarations, applications for import/export permits, and other supporting documents such as certificates of origin and trading invoices. The main value proposition for having a single window for a country or economy is to increase the efficiency through time and cost savings for traders in their dealings with government authorities for obtaining the relevant clearance and permit(s) for moving cargoes across national
Single-reed instrument Egypt include the arghul and the zummara. Examples include clarinets, saxophones, and some bagpipes. See links to other examples below. Single reed instruments fall under three Hornbostel–Sachs classes: The following is a list of clarinets and saxophones, relative to their range and key of transposition from the opposite family: Note that if one was to compare clarinets to their saxophone counterparts while considering their approximate lowest (concert) pitch†, the order would shift: Single-reed instrument A single-reed instrument is a woodwind instrument that uses only one reed to produce sound. The very earliest single-reed instruments were documented in ancient Egypt, as