The Rocket and gunpowder did not come from India, but from China. Zero was "invented" in many places independently. Read about it:

https://en.wikipedia.org/wiki/0
Digital computers were invented by Hungarians in the US. Like the Hungarian founder of Intel, or the Hungarian mathematician János (John) Neumann.

https://en.wikipedia.org/wiki/John_von_Neumann
The eastern world did not give any really important invention or any contribution or ideas in science and technology for the humankind since the late 13th century.

"It was considered that the earliest text to use a decimal place-value system, including a zero, is the Lokavibhāga, a Jain text on cosmology surviving in a medieval Sanskrit translation of the Prakrit original, which is internally dated to AD 458 (Saka era 380). In this text, śūnya ("void, empty") is also used to refer to zero.[28]"

As for rockets:-

https://en.wikipedia.org/wiki/Congreve_rocket
Here is an Eastern World Contribution:-

https://en.wikipedia.org/wiki/Kerala_School_of_Astronomy_and_Mathematics
"The Kerala School of Astronomy and Mathematics was a school of mathematics and astronomy founded by Madhava of Sangamagrama in Kerala, India, which included among its members: Parameshvara, Neelakanta Somayaji, Jyeshtadeva, Achyuta Pisharati, Melpathur Narayana Bhattathiri and Achyuta Panikkar. The school flourished between the 14th and 16th centuries and the original discoveries of the school seems to have ended with Narayana Bhattathiri (1559–1632). In attempting to solve astronomical problems, the Kerala school independently created a number of important mathematics concepts. Their most important results—series expansion for trigonometric functions—were described in Sanskrit verse in a book by Neelakanta called Tantrasangraha, and again in a commentary on this work, called Tantrasangraha-vakhya, of unknown authorship. The theorems were stated without proof, but proofs for the series for sine, cosine, and inverse tangent were provided a century later in the work Yuktibhasa (c. 1500 – c. 1610), written in Malayalam, by Jyesthadeva, and also in a commentary on Tantrasangraha.[1]

Their work, completed two centuries before the invention of calculus in Europe, provided what is now considered the first example of a power series (apart from geometric series).[2] However, they did not formulate a systematic theory of differentiation and integration, nor is there any direct evidence of their results being transmitted outside Kerala.[3][4][5][6]"