Answer:
is this about TV shows or series?
Explanation:
if yes, here's my answers (!not sure!)
1. B99
→ (B)rooklyn Nine-Nine/99
2. HIMYM
→ (H)ow (I) (M)et (Y)our (M)other
3. TBBT
→ (T)he (B)ig (B)ang (T)heory
4. TUA
→ (T)agged (U)ser (A)pproach
5. ATLA
→ (A)vatar (T)he (L)ast (A)irbender
