Steve Jobs is Type O-

I find his blood type on Japanese Wikipedia!
It is type O, Rh minus.
For some reason, there is no blood type information on English Wikipedia.
Why?

The following is another source.

For your information, Time Cook, Apple's present CEO is O-, too.

Interesting study by Prof. Hideo Hirose: Human Intuition Can Guess Blood Type

Here is an interesting study by Mr. Hideo Hirose, Professor at the Kyushu Institute of Technology (now he is at the Hiroshima Institute of Technology), in which person's ABO blood types can be guessed intuitively.

Source: Hirose Lab.

Hideo Hirose, A Probabilistic Solution for the Mystery of Japanese Blood Type Prediction Accuracy (2015) Asian Conference on Psychology & the Behavioral Sciences 2015 Official Conference Proceedings. -> Source (PDF)

We have revealed that people implicitly use the underlying knowledge of relationship between personality and ABO blood types as imprinting, which shows us superficial human intuition ability.

Multivariate Covariance Analysis (MANCOVA) Textbook

There was nothing good in Japanese, so I asked for an English version of the book.

Patrick Dattalo, Analysis of Multiple Dependent Variables

Ah, this book seems to be quite tough to read.
I hope it doesn't become a sleeping pill (laughs).

Hajime Yamagi: Blood Type B Is Vanishing - Was Albert Einstein disliked?

Hajime Yamagami has recently published his English book "Blood Type B Is Vanishing - Was Albert Einstein disliked?".

Currently, only ebook version is available; no paperback.

<Excerpts>
Said to be the best physicist of the twentieth century, Albert Einstein has been treated as a strange person due to his unbelievable behavior and going at his own pace. It was caused by his blood type "B"!

Does Your Blood Type Affect Your Personality?

I find an article "Does Your Blood Type Affect Your Personality?" which said,

There have been numerous studies that have attempted to use research and statistics to study the linkage between blood type and personality.  Unfortunately, research has proven to be inadequate and restricted, as statistically inappropriate measures, methods, and samples have been utilized.  This has resulted in the failure to show any statistically significant correlations between blood type and personality. Due to this fact, blood type personality theory is largely dismissed by the scientific community.

URL: https://www.e-counseling.com/mental-health/does-your-blood-type-affect-your-personality/

But this is NOT true!

One of the Japanese research (Grant-in-Aid for Scientific Research) said "We also demonstrate that significant difference on personal characteristics between blood-types by using the database on recent huge questionnaires survey", as the following:

[Investigator] Cosy Muto, Masahiro Nagashima et al.
[Title] A demonstrative and critical study on pseud-science for scientific literacy construction at teacher education course
[Abstract] We also demonstrate that significant difference on personal characteristics between blood-types by using the database on recent huge questionnaires survey.

A Group of Japanese Reseachers Has Discovered a New Blood Group "KANNO"

A group of Professor Hitoshi Oto of Fukushima Medical University has discovered a new blood group "KANNO", which was tentatively named after the antigen's provider.

The group is just waiting for the approval of the International Society of Blood Transfusion ...

If approved, this is will be the first case in Japan.

Source: Integrative genome analysis identified the KANNO blood group antigen as prion protein（TRANSFUSION）

Type O seems to be less suffering from Malaria

Now, a recent analysis of 23 papers suggests those with blood type O have the genetic odds stacked in their favor.

Having This One Particular Blood Type Can Help Protect You From Severe Malaria