A card on which binary coded data are recorded with recording density larger than a punched card. The recorded data can be readout by optical or magnetic readers.
一种二进制编码数据卡片，其记录密度大于穿孔卡片。所记录的数据可由光学或磁学读卡机读出。
2
The recorded data can be readout by optical or magnetic readers.
所记录的数据可由光学或磁学读卡机读出。
3
There are three types of scanning devices: optical scanners, bar code readers, and char and mark recognition devices.