@
%
#
$
Physical name
Path name
Primary name
Proper name
Single
Multiple
Dual
Solo
NN
DD
ZZ
YY
# mount /mnt/cdrw
# mount / mnt/cdrom
# mount/ mnt/cd
# mount/mnt/cdr
Cat
Pipe
More
Tee
Simultaneously
Constantly
Separately
None
Byte code
ANSI
ASCII
Unicode
Sometimes
Yes
No
Not always
Compiler
OS
Shell
Kernel