Jumping back and forth:

Characters.

There are several markup tags.

1. The B tag looks like this
   
2. The I tag looks like this
   
3. The U tag looks like this
   
4. The S tag looks like this
   
5. The TT tag looks like this
   
6. The _{SUB tag looks like this}
   
7. The ^{SUP tag looks like this}
   

This is normal text(no tags).
B tag looks like this
I tag looks like this
U tag looks like this
S tag looks like this


---

B tag looks like this
I tag looks like this
U tag looks like this
S tag looks like this


Some HTML tags

H.W.unit4 sect1+2 p334-p401

This is a Table

11	12	13
21	22	23

examples=http://suffolk.li/cs13/71cs13/students/bam/imgswap.html