Abstract: A tile marking tool uses a probe mounted on a biased marking arm to engage and follow a contour of an obstruction, such as a wall, cabinet, or heat vent, adjacent which floor tile must be installed. As the tool is moved along the wall, a marking element on the other end of the marking arm marks or cuts the contour of the obstruction on a tile or tiles to be laid, facilitating cutting and/or placement of the tile in such a way as to fit well against the obstruction. Embodiments include a corner marking arrangement for marking tiles to be laid in reentrant corners. The corner marking arrangement includes a corner arm attachable to and orthogonal to the marking arm so that the tool is used in usual fashion as it approaches the reentrant corner.

Abstract: A process that ensures the destruction of data files a user wishes to completely erase from a storage medium, such as a hard drive or removable disk. A system administrator can select a quantity of and pattern to be used in overwrites of the data file so that no one can recover the data from the storage medium. In embodiments, a graphical user interface (GUI) can be provided to allow user triggering of and parameter setting for the process. The GUI can be implemented at a device in which the storage medium is a component or can be implemented in a device driver GUI on a personal computer in communication with the device.