Convertible Tubas are Tubas that can be played as a Concert Instrument and as a Marching Instrument.
What is Calc? Calc is the spreadsheet component of OpenOffice.org (OOo). You can enter data, usually numerical data, in a spreadsheet and then manipulate this data to produce certain results. Alternatively you can enter data and then use Calc in a âWhat If...â manner by changing some of the data and observing the results without having to retype the entire spreadsheet or sheet.
What is a DAC? DAC is an acronym for Digital-to-Analog Converter. A DAC transforms digital signal into analog signal that can be then used by an analog device. A common example would be to convert digital music to analog for an amplifier (inside headphones or speakers). DACs are used in a wide variety of applications including modems.