For projects included in the first two exhibitions, many of the native-digital files had been lost, hardware to open files had ceased to exist, data storage formats had become obsolete and custom or commercial software programs were no longer compatible with archived data.
But we humans are smart enough to consciously weed out obsolete or counterproductive or garbled customs, so there's a second way for maladaptive items to be cleaned out of our cultural inheritance.
With the Reformation and the consequent disuse of prayers for the dead, the custom of waking became obsolete in England but survived in Ireland.
This informal custom, however, was considered obsolete by 1998.
Jacob eliminated all laws and customs that had been rendered obsolete by the destruction of the Second Temple (ad 70).
The world is currently full of custom-built applications written for obsolete operating systems.
These requests were fulfilled until the middle of the 20th century, after which the Royal Mint refused them; the colleges thereafter used obsolete circulation groats (fourpences), or dispensed with the custom.
There they work on projects that sometimes double as personality tests — allotted to them by 42's custom software, not by anything so quaint and obsolete as a teacher — in informal, self-organized groups.
And a custom print shop had donated a few tons of scrap paper (obsolete business cards, defective wedding invitations) to stuff the shell with kindling.
With the end of the Tokugawa regime in 1867, new customs of dress, and the introduction of the cigarette shortly after, netsuke became obsolete.
