Difference between Select-Options and Ranges
Here both SELECT-OPTIONS & RANGES works for the same purpose. They both are used for the range selection from selection screen. The main diff. between them is, while we use SELECT-OPTIONS system...
Differences between ABAP and OOABAP
OOABAP is used to develop BSP/PCUI applications and also anything involved object oriented like BADIs, SmartForms..etc.where as ABAP is used to develop traditional programs in R/3.