From Xojo Documentation
| This item was deprecated in version 2015r3.
Please use Int16 as a replacement.
Used to store 16-bit integer values. The default value is 0. Generally you will use the Integer data type (equivalent to Int32 on 32-bit apps or Int64 on 64-bit apps) or UInteger (equivalent to UInt32 on 32-bit apps or UInt64 on 64-bit apps). This size-specific integer data type is available for use with external OS APIs.
Short values can range from -32,768 to 32,767 and use 2 bytes.