Find the next term in the series: $\text{BMO, EOQ, HQS, ?}$

Let's analyze the positional shifts for each letter position independently:
1. First Letter: $\text{B}\stackrel{+3}{\to }\text{E}\stackrel{+3}{\to }\text{H}\stackrel{+3}{\to }\mathbf{K}$
2. Second Letter: $\text{M}\stackrel{+2}{\to }\text{O}\stackrel{+2}{\to }\text{Q}\stackrel{+2}{\to }\mathbf{S}$
3. Third Letter: $\text{O}\stackrel{+2}{\to }\text{Q}\stackrel{+2}{\to }\text{S}\stackrel{+2}{\to }\mathbf{U}$

Combining these results gives the next term: $\text{KSU}$.