Write-only memory (WOM) is the antithesis of read-only memory (ROM). By definition, a WOM is a memory device which can be written but never read. The WOM concept is most often used as a joke or a euphemism for a failed memory device.

An engineer at Signetics, frustrated by the long and useless sequence of approvals for data sheets (during which no actual checking occurred), once made up a spec for a “Write Only Memory” (a “WOM”) and sent it along with a batch of other data sheets to be approved. The WOM data sheet went through the approval chain, just fine, and wound up in Signetics’ new products catalog at 1970’s. Only after customers began asking for price and delivery. Signetics shortly printed up new “corrected” databooks, without any WOMs, and asked for the “erroneous” ones to be returned.

About 1974, Signetics bought a two-page, full-color spread in the April issue of ELECTRONICS Magazine, and published the WOM data sheet, as a (rather expensive) April Fool’s Joke. The data sheet is quite funny reading even today.

2009 Halloween Math Class v2 is a another funny video of a specially prepared math lecture from the same professor to honor of Halloween.

This is quite funny logo for an IC. This VIA GRA HT8501 is a real chip used on PC motherboards. The question is the naming of the chip intentional or just happened by accident?

Original image source:http://leenks.com/gallery1046-58.htm

If you want to do this yourself, the video includes the needed instructions how to do that.  To do the trick you can find the needed image using Google search or download it directly from fontblog. All you have to do is open the cracked screen image in Microsoft Picture and Fax Viewer then hit F11 and the cracked LCD screen image will appear in full screen mode looking like your friend’s LCD screen is cracked.