Of

of the order of

Used when estimating a quantity and means that it is roughly equal to.

Off Centre

Not centred; offset, eccentric, or inaccurate.

Offset Binary Coding

For bipolar signals, offset binary is a digital coding scheme in which the most negative value is represented by all zeros (00000000) and the most positive value is represented by all ones (11111111).

Offset Error

If you get a reading other than zero for a zero condition then you have an offset error.