Krypton Deepavali Special

Special Puzzle for Deepavali 2019

Vanchinathan

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Unfortunately this puzzle is not fillable  online. Readers have to do it the old-fashioned way, take a printout of the grid and  fill it up.
It makes up for being less tech-friendly by having many words related to
 technology! Have fun! Please send me an email  if you notice any errors or inaccuracies. My email id  my name as above at gmail dot com

Here is the  link to Hari Balakrishnan's online solver version. You can give your feedback on that online solver to him and about the quality of puzzle to me!

ACROSS

1. It does not drown in decimal numbers (8, 5)
8. It is sweet for adolescents and 10 for programmers (7)
9. Stellar clouds could be a lune formation (7)
11. Document is a regular expression string (6)
13. Agitating terrorist ends with fringe movement (8)
15. Reign of Error begins to confuse a Swiss mathematician (5)
16. Tell in court (y!=NULL) (7)
18. A place dug out to spit and confuse ? (7)
19. Hunted for bitcoins  other way getting a material  (5)
21. Come again to harvest the seed of a legume, right? (8)
23. Strange, I, Coxeter, have no hesitation to be violent (6)
25. Lead Yttrium I'd combined with dish  spoken in Israel (7)
26. Redistribute pal's alm and send junk email to everyone (4,3)
28. You don't need this if you can add two and two (6,2,5)

Down
2. Exit call almost ruined as per the dictionary (7)
3. Imitate the contents of a journal article (3)
4. What we get when we have electrons, more or less (4)
5. Magnanimity for a headless boy with steering trouble (10)
6.  A circuitous path for a logical operation with binary digit (5)
7. Cancel in full, by half, in a twisted way (7)
8. Data items in order to distribute electronic story with radar (6,5)
10. Large Integrated Circuit assembled in moon designed for workers' comfort (11)
12. It is the same old show about what exposes in a stocking (5)
14. Relative throws oars from an unusually faster heap sort (10)
17. Blind exercises bound and found at the end of a book (5)
18. Discredit uninitiated user holding territory (7)
20. The way electronic data travels around father, tenth circuit  (7)
22. It reveals true colours as per theory of public relations? (5)
24. Malayalam teacher was analytically content (4)
27. She was not fully the first man or the first programmer (3)