Toy robots, antique guns from the Austro-Hungarian imperial armoury, cameras, model ships, musical instruments - the Vienna Technical Museum simply doesn't have the space to put all of its treasures on display. So instead it's put them online in a virtual catalogue, creating one of the most fun locations on the internet for the technically minded.
The catalogue has photos and more or less detailed descriptions of more than 150,000 items and the database contains to grow. Visitors can search the catalogue by object, theme, events, geography, people and period.
There are around 7,000 items in the most highly researched collections, including steam engines and historical railroad equipment such as a track-surveying trolley.