## Invitation to Computer Science 8th Edition

The total number of characters $(ch)$ is $2$ surfaces/disk $\times 50$ tracks/surface $\times 20$ sectors /track $\times 1024$ ch/sector, which is $2,048,000$ characters on a single disk.
The total number of characters $(ch)$ is $2$ surfaces/disk $\times 50$ tracks/surface $\times 20$ sectors /track $\times 1024$ ch/sector, which is $2,048,000$ characters on a single disk.