Hi Sally!
If you are placing datas in code rom - yes. But if you want to place data outside of code rom (f.e. external memory, data memory ram) you have to use XSEG, DSEG, CSEG.
A few months ago I have wrote assembler program which has been using ORG instead of CSEG for characters' patterns, labels etc. Now, the program is translated to new enviroment and I have changed org to cseg. Program is working the same way.

Good luck,
Jacek