A killer application (often shortened to killer app) is any software that is so necessary or desirable that it proves the core value of some larger technology, such as its host computer hardware, video game console, software platform, or operating system.[1] Consumers would buy the host platform just to access that application, possibly substantially increasing sales of its host platform.[2][3]
Although the term was coined in the late 1980s[4][5] one of the first retroactively recognized examples of a killer application is the VisiCalc spreadsheet, released in 1979 for the Apple II series computer.[6][7] Because it was not released for other computers for 12 months, people spent US$100 (equivalent to $400 in 2022) for the software first, then $2,000 to $10,000 (equivalent to $8,000 to $40,000) on the requisite Apple II.[8] BYTE wrote in 1980, "VisiCalc is the first program available on a microcomputer that has been responsible for sales of entire systems",[9] and Creative Computing's VisiCalc review is subtitled "reason enough for owning a computer".[10] Others also developed software, such as EasyWriter, for the Apple II first because of its increasing sales.[citation needed]
The co-creator of WordStar, Seymour Rubinstein, argued that the honor of the first killer app should go to that popular word processor, given that it came out a year before VisiCalc and that it gave a reason for people to buy a computer.[11] However, whereas WordStar could be considered an incremental improvement (albeit a large one) over smart typewriters like the IBM Electronic Selectric Composer,[12] VisiCalc, with its ability to instantly recalculate rows and columns, introduced an entirely new paradigm and capability.[13]
The earliest known recorded use of the term in print is in the May 24, 1988 issue of PC Week: "Everybody has only one killer application. The secretary has a word processor. The manager has a spreadsheet."[15][16]
The definition of "killer app" came up during the questioning of Bill Gates in the United States v. Microsoft Corp. antitrust case. He had written an email in which he described Internet Explorer as a killer app. In the questioning, he said that the term meant "a popular application", and did not connote an application that would fuel sales of a larger product or one that would supplant its competition, as the Microsoft Computer Dictionary defined it.[citation needed]
Introducing the iPhone in 2007, Steve Jobs said that "the killer app is making calls".[17] Reviewing the iPhone's first decade, David Pierce for Wired wrote that although Jobs prioritized a good experience making calls in the phone's development, other features of the phone soon became more important, such as its data connectivity and ability to install third-party software (which was added later).[18]
We monitor the Plan's progress and ensure it meets the MMPA goal of reducing mortality and serious injury of false killer whales incidental to the fisheries addressed by the Plan. If mortality and serious injury is not reduced to appropriate levels, we will reconvene the Team to develop additional measures.
Michael Ray Schlicht is believed to be an early victim of infamous serial killer Randy Kraft -- who was sentenced to death in 1989 for the brutal murders of 16 young men in Orange County between 1972 and 1983 -- according to the Orange County Sheriff's Department.
Kraft was convicted of murder and sodomy in May 1989 and sentenced to death. Prosecutors at the time said he may be the worst serial killer in the nation's history. Kraft, 78, remains on death row at San Quentin State Prison.
When trained chefs George & Katie Brown set out to spice up a plain bag of Texas pecans, a killer snack was born. Sweet and spicy with a bold kick, Killer Pecans combines the crunch of fresh Mammoth pecans with chef-crafted flavor for a Texas-sized taste that is truly chef's kiss.
This paper argues incumbent firms may acquire innovative targets solely to discontinue the target's innovation projects and preempt future competition. We call such acquisitions "killer acquisitions." We develop a model illustrating this phenomenon. Using pharmaceutical industry data, we show that acquired drug projects are less likely to be developed when they overlap with the acquirer's existing product portfolio, especially when the acquirer's market power is large due to weak competition or distant patent expiration. Conservative estimates indicate 5.3 percent to 7.4 percent of acquisitions in our sample are killer acquisitions. These acquisitions disproportionately occur just below thresholds for antitrust scrutiny.
The fetus is considered to be an allograft that, paradoxically, survives pregnancy despite the laws of classical transplantation immunology. There is no direct contact of the mother with the embryo, only with the extraembryonic placenta as it implants in the uterus. No convincing evidence of uterine maternal T-cell recognition of placental trophoblast cells has been found, but instead, there might be maternal allorecognition mediated by uterine natural killer cells that recognize unusual fetal trophoblast MHC ligands.
Killer whales occupy pelagic and coastal (including inland marine) waters. Southern Resident and transient killer whales spend more time in coastal areas, where their preferred prey is typically found. The Southern Resident population feeds primarily on Chinook salmon, chum salmon to a lesser extent, and occasionally other fish. Transient animals feed on seals and other marine mammals. Offshore animals primarily feed on sharks and other fish.
Offshore killer whales are much less studied, but also form one population extending from southeastern Alaska to California. These whales usually occur more than nine miles off the outer coast. Offshore killer whales are estimated at 300 individuals and have a stable population trend.
Climate change will likely impact all three ecotypes of killer whales (Southern Residents, transients, offshores) in Washington. This will occur mainly through alterations in prey abundance (i.e., availability of Chinook salmon, marine mammals, sharks, and other prey) resulting from (1) changes in marine food webs, (2) alterations in freshwater habitats occupied by salmon (for Southern Residents), and (3) rising sea level, which may submerge or render unsuitable some traditional pinniped rookeries and haulouts (for transients), and some nearshore habitats required by salmon (for Southern Residents). These impacts will likely result from increases in marine and freshwater temperature, increases in ocean acidification, and altered levels of terrestrial precipitation and runoff. Southern Resident whales are specialists on Chinook salmon, which are themselves quite vulnerable to climate change.
All three populations of killer whale occurring in Washington carry heavy loads of environmental contaminants, face a continuing risk of major oil spills in their ranges, are susceptible to a disease outbreak, and will likely experience the impacts of climate change in the future.
Alteration in the expression of cell-surface proteins is a common consequence of malignant transformation. Natural killer (NK) cells use an array of germline-encoded activating and inhibitory receptors that scan for altered protein-expression patterns, but tumor evasion of detection by the immune system is now recognized as one of the hallmarks of cancer. NK cells display rapid and potent immunity to metastasis or hematological cancers, and major efforts are now being undertaken to fully exploit NK cell anti-tumor properties in the clinic. Diverse approaches encompass the development of large-scale NK cell-expansion protocols for adoptive transfer, the establishment of a microenvironment favorable to NK cell activity, the redirection of NK cell activity against tumor cells and the release of inhibitory signals that limit NK cell function. In this Review we detail recent advances in NK cell-based immunotherapies and discuss the advantages and limitations of these strategies.
Analysing population genomic data from killer whale ecotypes, which we estimate have globally radiated within less than 250,000 years, we show that genetic structuring including the segregation of potentially functional alleles is associated with socially inherited ecological niche. Reconstruction of ancestral demographic history revealed bottlenecks during founder events, likely promoting ecological divergence and genetic drift resulting in a wide range of genome-wide differentiation between pairs of allopatric and sympatric ecotypes. Functional enrichment analyses provided evidence for regional genomic divergence associated with habitat, dietary preferences and post-zygotic reproductive isolation. Our findings are consistent with expansion of small founder groups into novel niches by an initial plastic behavioural response, perpetuated by social learning imposing an altered natural selection regime. The study constitutes an important step towards an understanding of the complex interaction between demographic history, culture, ecological adaptation and evolution at the genomic level.
To better understand and visualize the complexity of the ancestry of killer whale ecotypes, we reconstructed the genetic relationships among ecotypes in the form of a maximum likelihood graph (Fig. 2a), representing the degree of genetic drift and modelling both population splits and gene flow using the unified statistical framework implemented in TreeMix (ref. 24). The inferred migration edges were supported by the three-population (f3) and D-statistic (ABBA-BABA)25 tests, which can provide clear evidence of admixture, even if the gene flow events occurred hundreds of generations ago26. These population genomic methods test for asymmetry in the covariance of allele frequencies that indicate that the relationships among populations are not fully described by a simple bifurcating tree model.
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