Protractor on the dial from 180°, as the dial is graduated from opposite zero marks to 90° each way. Since the spaces, both on the main scale and the Vernier scale, are numbered both to the right and to the left from zero, any angle can be measured. The readings can be taken either to the right or to the left, according to the direction in which the zero on the main scale is moved. Reading the Vernier scale: The bevel protractor Vernier scale may have graduations of 5′ (minutes) or 1/12°. Each space on the Vernier scale is 5′ less
OMB Circular A-130 of information in the operation of Federal programs. The initial release of the Circular provided a policy framework for information resources management (IRM) across the Federal government. Since the time of the Circular's first release in 1985, Congress has enacted several additional laws and OMB issued several guidance documents that related to information technology management in federal agencies. To account for these new laws and guidance, OMB has revised the Circular three times, in 1994, 1996, and 2000. A complete rewrite of the Circular to both update and to correct for known deficiencies has been considered since at least 2005,