An spd file extension is related to the IBM Storyboard and used for its PIC image.
SDP file extension - IBM Storyboard PIC image
What is sdp file? How to open sdp files?
File type specification:
The sdp file extension used by IBM Storyboard graphics tool for creating, editing, arranging, and presenting slide shows. File contains PIC image used by IBM Storyboard.
IBM Storyboard is obsolete product.
This sdp file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.
The default software associated to open sdp file:
Company or developer:
IBM
IBM Storyboard Plus was a graphics tool for creating, editing, arranging, and presenting slide shows on your computer monitor.
List of recommended software applications associated to the .sdp file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open sdp file, edit sdp file, convert sdp file, view sdp file, play sdp file etc. (if exist software for corresponding action in File-Extensions.org's database).
Unspecified and all other actions for computer programs working with sdp file - IBM Storyboard PIC image
Click on the software link for more information about IBM Storyboard. IBM Storyboard uses sdp file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).